patch 8.0.0749: some unicode digraphs are hard to remember

Problem:    Some unicode digraphs are hard to remember.
Solution:   Add alternatives with a backtick. (Chris Harding, closes #1861)
diff --git a/src/version.c b/src/version.c
index 0564b8f..486cd6f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    749,
+/**/
     748,
 /**/
     747,