patch 9.1.1383: completion: 'isexpand' option does not handle space char correct

Problem:  When a space character is used as a trigger in 'isexpand' option
          it doesn't get recognized because skip_to_option_part() skips
          spaces after a comma, treating them as option separators
          rather than option value (after v9.1.1341)
Solution: manually set the part to a space character (glepnir).

closes: #17305

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 816ce5c..4a9ad83 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1383,
+/**/
     1382,
 /**/
     1381,