Replace `iff' in comments.

78 files changed, 81 insertions, 77 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 06bcbaf3a0..adef925992 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2007-08-08  Glenn Morris  <rgm@gnu.org>
+
+	* Replace `iff' in doc-strings and comments.
+
 2007-08-07  Chong Yidong  <cyd@stupidchicken.com>
 
 	* dispextern.h (struct image): New members.
diff --git a/src/m/7300.h b/src/m/7300.h
index b590593abc..6e439a829c 100644
--- a/src/m/7300.h
+++ b/src/m/7300.h
@@ -30,7 +30,7 @@ Boston, MA 02110-1301, USA.  */
 /* # define SHORTNAMES */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/acorn.h b/src/m/acorn.h
index 7fa5991e28..148d46454a 100644
--- a/src/m/acorn.h
+++ b/src/m/acorn.h
@@ -21,7 +21,7 @@ Boston, MA 02110-1301, USA.  */
 
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/alliant-2800.h b/src/m/alliant-2800.h
index 3d65f9d1f1..405267afb2 100644
--- a/src/m/alliant-2800.h
+++ b/src/m/alliant-2800.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/alliant.h b/src/m/alliant.h
index b871d4a238..7cad4bfb0c 100644
--- a/src/m/alliant.h
+++ b/src/m/alliant.h
@@ -26,7 +26,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/alpha.h b/src/m/alpha.h
index d9fd342ef1..53fc1780df 100644
--- a/src/m/alpha.h
+++ b/src/m/alpha.h
@@ -35,7 +35,7 @@ NOTE-END
 				   on OSF 4/5  -- fx.  */
 #endif
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/altos.h b/src/m/altos.h
index 8a1cb13834..0f4bb9b810 100644
--- a/src/m/altos.h
+++ b/src/m/altos.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/amdahl.h b/src/m/amdahl.h
index 3d9ee17e91..486e2925a5 100644
--- a/src/m/amdahl.h
+++ b/src/m/amdahl.h
@@ -31,7 +31,7 @@ This file works with the Amdahl uts native C compiler. The 5.2u370
 compiler is so brain damaged that it is not even worth trying to use it.
 */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/amdx86-64.h b/src/m/amdx86-64.h
index fbd53a955a..681be8b064 100644
--- a/src/m/amdx86-64.h
+++ b/src/m/amdx86-64.h
@@ -26,7 +26,7 @@ Boston, MA 02110-1301, USA.  */
 #define BITS_PER_LONG           64
 #define BITS_PER_EMACS_INT      64
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/apollo.h b/src/m/apollo.h
index b769c24c29..2eac3098db 100644
--- a/src/m/apollo.h
+++ b/src/m/apollo.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/arm.h b/src/m/arm.h
index b1df83f9b7..697179723f 100644
--- a/src/m/arm.h
+++ b/src/m/arm.h
@@ -21,7 +21,7 @@ Boston, MA 02110-1301, USA.  */
 
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/att3b.h b/src/m/att3b.h
index 3344aabc2a..8e9a589bcd 100644
--- a/src/m/att3b.h
+++ b/src/m/att3b.h
@@ -26,7 +26,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/aviion.h b/src/m/aviion.h
index 7f3f7f253d..832feb79a0 100644
--- a/src/m/aviion.h
+++ b/src/m/aviion.h
@@ -20,7 +20,7 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/celerity.h b/src/m/celerity.h
index 76f1e1729b..556c276588 100644
--- a/src/m/celerity.h
+++ b/src/m/celerity.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/clipper.h b/src/m/clipper.h
index de99ba97eb..c0006f48ea 100644
--- a/src/m/clipper.h
+++ b/src/m/clipper.h
@@ -20,7 +20,7 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/cnvrgnt.h b/src/m/cnvrgnt.h
index f64fc86b08..22478a273b 100644
--- a/src/m/cnvrgnt.h
+++ b/src/m/cnvrgnt.h
@@ -20,7 +20,7 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/convex.h b/src/m/convex.h
index 7f90d22117..c8f447cf2f 100644
--- a/src/m/convex.h
+++ b/src/m/convex.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/cydra5.h b/src/m/cydra5.h
index 2361fb4b58..4c95f22637 100644
--- a/src/m/cydra5.h
+++ b/src/m/cydra5.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/delta88k.h b/src/m/delta88k.h
index c767e1db1c..b5d0c8f190 100644
--- a/src/m/delta88k.h
+++ b/src/m/delta88k.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/dpx2.h b/src/m/dpx2.h
index 1c1d146a08..b39ef93ee3 100644
--- a/src/m/dpx2.h
+++ b/src/m/dpx2.h
@@ -32,7 +32,7 @@ Boston, MA 02110-1301, USA.  */
 /* #define ncl_el	/* DPX/2 210,220 etc */
 /* #define ncl_mr 1	/* DPX/2 320,340 (and 360,380 ?) */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/dual.h b/src/m/dual.h
index 4fda7a8a96..d287f9502d 100644
--- a/src/m/dual.h
+++ b/src/m/dual.h
@@ -35,7 +35,7 @@ Dual running Uniplus (-machine=dual -opsystem=unipl5-2)
 NOTE-END */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/elxsi.h b/src/m/elxsi.h
index 81689e66e5..07a00bbf71 100644
--- a/src/m/elxsi.h
+++ b/src/m/elxsi.h
@@ -27,7 +27,7 @@ Boston, MA 02110-1301, USA.  */
 /* This file was modified by Matt Crawford <matt@tank.uchicago.edu>
    to work under Elxsi's 12.0 release of BSD unix. */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/gould.h b/src/m/gould.h
index c31f50249e..cd16e09b78 100644
--- a/src/m/gould.h
+++ b/src/m/gould.h
@@ -49,7 +49,7 @@ Gould Power Node (-machine=gould -opsystem=bsd4-2 or bsd4-3)
   A site running a pre-release of 2.1 should #define RELEASE2_1 in config.h.
 NOTE-END */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/hp800.h b/src/m/hp800.h
index d54690104b..8346505247 100644
--- a/src/m/hp800.h
+++ b/src/m/hp800.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="hpux"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/hp9000s300.h b/src/m/hp9000s300.h
index 3718bb3f3a..9a27065f86 100644
--- a/src/m/hp9000s300.h
+++ b/src/m/hp9000s300.h
@@ -59,7 +59,7 @@ NOTE-END */
 
 /* #define HPUX_5 */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/i860.h b/src/m/i860.h
index 1255f2f157..6d79c5c8d3 100644
--- a/src/m/i860.h
+++ b/src/m/i860.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="<name of system .h file here, without the s- or .h>"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/ia64.h b/src/m/ia64.h
index b6fea6b8fd..8f7fed8d69 100644
--- a/src/m/ia64.h
+++ b/src/m/ia64.h
@@ -23,7 +23,7 @@ Boston, MA 02110-1301, USA.  */
 #define BITS_PER_LONG		64
 #define BITS_PER_EMACS_INT	64
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/ibm370aix.h b/src/m/ibm370aix.h
index f632a30780..0195ec141a 100644
--- a/src/m/ibm370aix.h
+++ b/src/m/ibm370aix.h
@@ -30,7 +30,7 @@ Boston, MA 02110-1301, USA.  */
 #undef INTEL386
 #undef aix386
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/ibmps2-aix.h b/src/m/ibmps2-aix.h
index 8882052b00..8c975b81bb 100644
--- a/src/m/ibmps2-aix.h
+++ b/src/m/ibmps2-aix.h
@@ -30,7 +30,7 @@ NOTE-START
   work with certain new X window managers, and may be suboptimal.
 NOTE-END */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/ibmrs6000.h b/src/m/ibmrs6000.h
index 2a298e7f76..d542c07ad0 100644
--- a/src/m/ibmrs6000.h
+++ b/src/m/ibmrs6000.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="aix3-1"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #ifdef USG5_4
diff --git a/src/m/ibmrt-aix.h b/src/m/ibmrt-aix.h
index d24e99fe6d..57a9dbc4df 100644
--- a/src/m/ibmrt-aix.h
+++ b/src/m/ibmrt-aix.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/ibmrt.h b/src/m/ibmrt.h
index 55cbfd8837..ca32db9451 100644
--- a/src/m/ibmrt.h
+++ b/src/m/ibmrt.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/ibms390.h b/src/m/ibms390.h
index aece0f7599..1c7165e04c 100644
--- a/src/m/ibms390.h
+++ b/src/m/ibms390.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="<name of system .h file here, without the s- or .h>"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/ibms390x.h b/src/m/ibms390x.h
index fb1f210c63..64ede365d0 100644
--- a/src/m/ibms390x.h
+++ b/src/m/ibms390x.h
@@ -36,7 +36,7 @@ NOTE-END */
 #define BITS_PER_LONG 64
 #define BITS_PER_EMACS_INT 64
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/intel386.h b/src/m/intel386.h
index 7c6c2106d1..22205ed762 100644
--- a/src/m/intel386.h
+++ b/src/m/intel386.h
@@ -50,7 +50,7 @@ Prime EXL (-machine=intel386 -opsystem=usg5-3)
   Minor changes merged in 19.1.
 NOTE-END */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/iris4d.h b/src/m/iris4d.h
index d918c25aed..4c15131e59 100644
--- a/src/m/iris4d.h
+++ b/src/m/iris4d.h
@@ -20,7 +20,7 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/irist.h b/src/m/irist.h
index 0b33bd964a..c0d55f96d0 100644
--- a/src/m/irist.h
+++ b/src/m/irist.h
@@ -58,7 +58,7 @@ NOTE-END */
   (copy-file), it would say that it is non-critical...
 #endif /* 0 */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/isi-ov.h b/src/m/isi-ov.h
index 7e25ed9d27..6706ee9981 100644
--- a/src/m/isi-ov.h
+++ b/src/m/isi-ov.h
@@ -30,7 +30,7 @@ NOTE-END */
 
 #define ISI68K
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/m68k.h b/src/m/m68k.h
index c771e86371..4c600a44d8 100644
--- a/src/m/m68k.h
+++ b/src/m/m68k.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
  the size of various data types.  */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/macppc.h b/src/m/macppc.h
index cc4afe3151..d4561c0289 100644
--- a/src/m/macppc.h
+++ b/src/m/macppc.h
@@ -19,7 +19,7 @@ along with GNU Emacs; see the file COPYING.  If not, write to
 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/masscomp.h b/src/m/masscomp.h
index ac753de153..4e95c26886 100644
--- a/src/m/masscomp.h
+++ b/src/m/masscomp.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="rtu"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/mega68.h b/src/m/mega68.h
index 6d991ba06a..0d22b572fc 100644
--- a/src/m/mega68.h
+++ b/src/m/mega68.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/mg1.h b/src/m/mg1.h
index 647544e21e..515e9e23a9 100644
--- a/src/m/mg1.h
+++ b/src/m/mg1.h
@@ -34,7 +34,7 @@ own configuration files, please let the Free Software Foundation in on
 your work; we'd like to distribute this information.
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/mips-siemens.h b/src/m/mips-siemens.h
index d90a651d36..53366a1332 100644
--- a/src/m/mips-siemens.h
+++ b/src/m/mips-siemens.h
@@ -36,7 +36,7 @@ This is the m- file for SNI RM*00 machines. Use s- sinix5-4.h file!
 With this the file mips-siemens.h is obsolete.
 NOTE-END  */
 
-/* Define BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define BIG_ENDIAN
diff --git a/src/m/mips.h b/src/m/mips.h
index b18324fb8b..6c039c5e14 100644
--- a/src/m/mips.h
+++ b/src/m/mips.h
@@ -29,7 +29,7 @@ Use mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world.
 Note that the proper m file for the Decstation is pmax.h.
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #if ! (defined (__MIPSEL__) || defined (MIPSEL) || defined (_MIPSEL))
diff --git a/src/m/news.h b/src/m/news.h
index 419015dd15..084c5abb92 100644
--- a/src/m/news.h
+++ b/src/m/news.h
@@ -34,7 +34,7 @@ NOTE-END  */
 #define m68000
 #endif
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/next.h b/src/m/next.h
index ef92607d95..bca8ac39d4 100644
--- a/src/m/next.h
+++ b/src/m/next.h
@@ -26,7 +26,7 @@ Boston, MA 02110-1301, USA.  */
 #define NeXT
 #endif
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 /* Let the compiler tell us.  */
diff --git a/src/m/ns16000.h b/src/m/ns16000.h
index c64bfa3248..6feddd9761 100644
--- a/src/m/ns16000.h
+++ b/src/m/ns16000.h
@@ -30,7 +30,7 @@ For a Tektronix 16000 box (a 6130, perhaps?), use `-opsystem=bsd4-2'.
 Use `-machine=ns16000' for both.
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/ns32000.h b/src/m/ns32000.h
index 0b776115ca..b6484b4b21 100644
--- a/src/m/ns32000.h
+++ b/src/m/ns32000.h
@@ -25,7 +25,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/nu.h b/src/m/nu.h
index 347606a6c0..279d14ff91 100644
--- a/src/m/nu.h
+++ b/src/m/nu.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/orion.h b/src/m/orion.h
index 36a74b3cc3..cc3a7e395f 100644
--- a/src/m/orion.h
+++ b/src/m/orion.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/orion105.h b/src/m/orion105.h
index 73408ed1b2..fabcf67e2a 100644
--- a/src/m/orion105.h
+++ b/src/m/orion105.h
@@ -25,7 +25,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/pfa50.h b/src/m/pfa50.h
index 8f1f146000..5f98dc993c 100644
--- a/src/m/pfa50.h
+++ b/src/m/pfa50.h
@@ -20,7 +20,7 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/plexus.h b/src/m/plexus.h
index 4a4e6a32f7..5196197790 100644
--- a/src/m/plexus.h
+++ b/src/m/plexus.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/powermac.h b/src/m/powermac.h
index 729bbb0358..2dde47bd6c 100644
--- a/src/m/powermac.h
+++ b/src/m/powermac.h
@@ -23,7 +23,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="darwin"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/powerpcle.h b/src/m/powerpcle.h
index 403d6986bf..5be26e93b1 100644
--- a/src/m/powerpcle.h
+++ b/src/m/powerpcle.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    USUAL-OPSYS="Solaris2.5.1 Windows/NT AIX 4.1.2"
 */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/pyramid.h b/src/m/pyramid.h
index 9ee3fefe38..1b834c60ba 100644
--- a/src/m/pyramid.h
+++ b/src/m/pyramid.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/sequent.h b/src/m/sequent.h
index be5d3f19bd..3c06d854b4 100644
--- a/src/m/sequent.h
+++ b/src/m/sequent.h
@@ -31,7 +31,7 @@ NOTE-END */
 /* NOTE: this file works for DYNIX release 2.0
 	  (not tested on 1.3) on NS32000's */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/sh3el.h b/src/m/sh3el.h
index 5851ade152..eefcccea6d 100644
--- a/src/m/sh3el.h
+++ b/src/m/sh3el.h
@@ -23,7 +23,7 @@ Boston, MA 02111-1307, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="<name of system .h file here, without the s- or .h>"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/sparc.h b/src/m/sparc.h
index f59c2c2b96..8df81ee91a 100644
--- a/src/m/sparc.h
+++ b/src/m/sparc.h
@@ -28,7 +28,7 @@ Use -opsystem=sunos4 for operating system version 4, and
 -opsystem=bsd4-2 for earlier versions.
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/sps7.h b/src/m/sps7.h
index 68acf2c6c5..67fc60c1b6 100644
--- a/src/m/sps7.h
+++ b/src/m/sps7.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/sr2k.h b/src/m/sr2k.h
index ba4a9a905a..6c17795e05 100644
--- a/src/m/sr2k.h
+++ b/src/m/sr2k.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="hpux"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/stride.h b/src/m/stride.h
index cb0380024a..d846a6c984 100644
--- a/src/m/stride.h
+++ b/src/m/stride.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/sun1.h b/src/m/sun1.h
index fda451a931..03cb4e803f 100644
--- a/src/m/sun1.h
+++ b/src/m/sun1.h
@@ -40,7 +40,7 @@ Sun 1, 2 and 3 (-machine=sun1, -machine=sun2, -machine=sun3;
   problems caused by bugs in the "export" version of SunOS 4.
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/sun2.h b/src/m/sun2.h
index 00b7ae97c4..e764ded3ce 100644
--- a/src/m/sun2.h
+++ b/src/m/sun2.h
@@ -42,7 +42,7 @@ Sun 1, 2 and 3 (-machine=sun1, -machine=sun2, -machine=sun3;
   problems caused by bugs in the "export" version of SunOS 4.
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/tad68k.h b/src/m/tad68k.h
index 5e982a314a..c8be8763fb 100644
--- a/src/m/tad68k.h
+++ b/src/m/tad68k.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/tahoe.h b/src/m/tahoe.h
index 8fe41cd410..9b9271577f 100644
--- a/src/m/tahoe.h
+++ b/src/m/tahoe.h
@@ -29,7 +29,7 @@ Use -opsystem=bsd4-2 or -opsystem=bsd4-3, depending on the version of
 Berkeley you are running.
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/targon31.h b/src/m/targon31.h
index 0c657e0ea5..39e995b076 100644
--- a/src/m/targon31.h
+++ b/src/m/targon31.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/tek4300.h b/src/m/tek4300.h
index be43210212..6498238461 100644
--- a/src/m/tek4300.h
+++ b/src/m/tek4300.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="bsd4-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/tekxd88.h b/src/m/tekxd88.h
index 1d46bb9bb5..f351229292 100644
--- a/src/m/tekxd88.h
+++ b/src/m/tekxd88.h
@@ -22,7 +22,7 @@ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/template.h b/src/m/template.h
index fccc5b0901..b893ba23df 100644
--- a/src/m/template.h
+++ b/src/m/template.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="<name of system .h file here, without the s- or .h>"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/tower32.h b/src/m/tower32.h
index 0ce623b7f3..01daada242 100644
--- a/src/m/tower32.h
+++ b/src/m/tower32.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/tower32v3.h b/src/m/tower32v3.h
index 226c0e2640..ff209edab4 100644
--- a/src/m/tower32v3.h
+++ b/src/m/tower32v3.h
@@ -25,7 +25,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/ustation.h b/src/m/ustation.h
index f88cdc5ee6..0ac833c28d 100644
--- a/src/m/ustation.h
+++ b/src/m/ustation.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-3"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/vax.h b/src/m/vax.h
index 80844ba3ba..8269507442 100644
--- a/src/m/vax.h
+++ b/src/m/vax.h
@@ -52,7 +52,7 @@ Vax running VMS (-opsystem=vms)
 
 NOTE-END  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #undef WORDS_BIG_ENDIAN
diff --git a/src/m/wicat.h b/src/m/wicat.h
index 6740984466..3ac7b53073 100644
--- a/src/m/wicat.h
+++ b/src/m/wicat.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN
diff --git a/src/m/windowsnt.h b/src/m/windowsnt.h
index f1efe64a4f..ddad551c77 100644
--- a/src/m/windowsnt.h
+++ b/src/m/windowsnt.h
@@ -24,7 +24,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="<name of system .h file here, without the s- or .h>"  */
 
-/* Define BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 /* #define BIG_ENDIAN */
diff --git a/src/m/xps100.h b/src/m/xps100.h
index 691f5fedbd..3b378319ce 100644
--- a/src/m/xps100.h
+++ b/src/m/xps100.h
@@ -26,7 +26,7 @@ Boston, MA 02110-1301, USA.  */
    operating system this machine is likely to run.
    USUAL-OPSYS="usg5-2"  */
 
-/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
+/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
 
 #define WORDS_BIG_ENDIAN