patch 8.1.0279: 'incsearch' highlighting does not skip white space

Problem:    'incsearch' highlighting does not skip white space.
Solution:   Skip white space after the command. (issue #3321)
diff --git a/src/version.c b/src/version.c
index e1f2c6f..4a9dd14 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    279,
+/**/
     278,
 /**/
     277,