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-rw-r--r--src/xdisp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/xdisp.c b/src/xdisp.c
index bd6165b9e59..24120fd83bb 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -239,7 +239,8 @@ message1 (m)
}
/* Display an echo area message M with a specified length of LEN chars.
- This way, null characters can be included. */
+ This way, null characters can be included. Do not pass text that is
+ stored in a Lisp string. */
void
message2 (m, len)