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-rw-r--r--src/fileio.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/fileio.c b/src/fileio.c
index 37948bc0ee..bf6bf622ab 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -4654,7 +4654,8 @@ DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7,
When called from a program, requires three arguments:
START, END and FILENAME. START and END are normally buffer positions
specifying the part of the buffer to write.
-If START is nil, that means to use the entire buffer contents.
+If START is nil, that means to use the entire buffer contents; END is
+ignored.
If START is a string, then output that string to the file
instead of any buffer contents; END is ignored.