patch 8.1.0227: spaces instead of tabs in makefile

Problem:    Spaces instead of tabs in makefile.
Solution:   Use tabs and fix sorting. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index ff1c00a..6528355 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    227,
+/**/
     226,
 /**/
     225,