patch 9.0.0988: using feedkeys() does not show up in a channel log

Problem:    Using feedkeys() does not show up in a channel log.
Solution:   Add ch_log() calls and clean up the code.

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    988,
 /**/
     987,
 /**/