patch 9.1.0772: some missing changes from v9.1.0771

Problem:  some missing changes from v9.1.0771
Solution: use correct highlighting attribute and adjust comments
          (glepnir)

closes: #15836

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/insexpand.c b/src/insexpand.c
index eb920a7..c22eb6d 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -105,8 +105,7 @@
     int		cp_flags;		// CP_ values
     int		cp_number;		// sequence number
     int		cp_score;		// fuzzy match score
-    int		cp_user_abbr_hlattr;	// highlight attribute to combine with
-					// for abbr.
+    int		cp_user_abbr_hlattr;	// highlight attribute for abbr
     int		cp_user_kind_hlattr;	// highlight attribute for kind
 };