pict: rectangle: Add docstring.

* pict.scm (rectangle): Add docstring.

1 files changed, 4 insertions, 0 deletions

diff --git a/pict.scm b/pict.scm
index a70a558..a5f0b0b 100644
--- a/pict.scm
+++ b/pict.scm
@@ -724,6 +724,10 @@ override the line color and line thickness."
                     (border-width 1)
                     (rx 0)
                     (ry 0))
+  "Return a rectangle with width W and height H.  The keys
+BORDER-COLOR (a string) and BORDER-WIDTH (a number) are accepted to
+override the line color and line thickness, respectively.  The keys RX
+and RY can be provided to round off the corners."
   (make-pict
    `(svg (@ (width ,w)
             (height ,h)