tweak in comment

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush.c b/shell/hush.c
index 171b739..24134fd 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -2007,7 +2007,7 @@
 /* There in a GNU extension, GLOB_BRACE, but it is not usable:
  * first, it processes even {a} (no commas), second,
  * I didn't manage to make it return strings when they don't match
- # existing files. Need to re-implement it.
+ * existing files. Need to re-implement it.
  *
  * This code needs corresponding quoting on variable expansion side.
  * Currently, "a='{q,w}'; echo $a" erroneously expands braces in $a