(syms_of_buffer): Document `%i' and `%I' constructs for

`mode-line-format'.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
index de466de485a..e41d114eaa3 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5372,6 +5372,8 @@ A string is printed verbatim in the mode line except for %-constructs:
   %c -- print the current column number (this makes editing slower).
         To make the column number update correctly in all cases,
         `column-number-mode' must be non-nil.
+  %i -- print the size of the buffer.
+  %I -- like %i, but use k, M, G, etc., to abbreviate.
   %p -- print percent of buffer above top of window, or Top, Bot or All.
   %P -- print percent of buffer above bottom of window, perhaps plus Top,
         or print Bottom or All.