(Fsubstitute_command_keys): Fix counding bytes.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/doc.c b/src/doc.c
index 0e22f6d1059..930afc88e23 100644
--- a/src/doc.c
+++ b/src/doc.c
@@ -821,7 +821,7 @@ thus, \\=\\=\\=\\= puts \\=\\= into the output, and \\=\\=\\=\\[ puts \\=\\[ int
           start = strp;
           start_idx = start - SDATA (string);
 
-          while ((strp - SDATA (string) < SCHARS (string))
+          while ((strp - SDATA (string) < SBYTES (string))
                  && *strp != '}' && *strp != '>')
             strp++;