builtin-apply: typofix

Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-apply.c b/builtin-apply.c
index 1103625..776e596 100644
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -418,7 +418,7 @@
 }
 
 /*
- * Get the name etc info from the --/+++ lines of a traditional patch header
+ * Get the name etc info from the ---/+++ lines of a traditional patch header
  *
  * FIXME! The end-of-filename heuristics are kind of screwy. For existing
  * files, we can happily check the index for a match, but for creating a