(Fformat): Add comment about the treatment of 0 as a multibyte

character.

diff --git a/src/editfns.c b/src/editfns.c
index 26d811d8f4371911c415cd3954af3eca635ebf57..d5293e170c8e63fe2d3e5ad45c35340172a610b9 100644 (file)
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -3367,6 +3367,10 @@ usage: (format STRING &rest OBJECTS)  */)
            if (*format == 'c')
              {
                if (! SINGLE_BYTE_CHAR_P (XINT (args[n]))
+                   /* Note: No one can remeber why we have to treat
+                      the character 0 as a multibyte character here.
+                      But, until it causes a real problem, let's
+                      don't change it.  */
                    || XINT (args[n]) == 0)
                  {
                    if (! multibyte)