* src/buffer.c (syms_of_buffer) <fill-column>: Improve doc string.

diff --git a/src/buffer.c b/src/buffer.c
index 92ed405b6f7360b190808f2b76c6948ec529ebb8..5433c80edb0f4d38d9d4d94bb590bf6ebb83d532 100644 (file)
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5625,6 +5625,9 @@ Use the command `abbrev-mode' to change this variable.  */);
   DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column),
                     Qintegerp,
                     doc: /* Column beyond which automatic line-wrapping should happen.
+It is used by filling commands, such as `fill-region' and `fill-paragraph',
+and by `auto-fill-mode', which see.
+See also `current-fill-column'.
 Interactively, you can set the buffer local value using \\[set-fill-column].  */);
 
   DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin),