patch 8.2.1747: result of expand() unexpectedly depends on 'completeslash'

Problem:    Result of expand() unexpectedly depends on 'completeslash'.
Solution:   Temporarily reset 'completeslash'. (Yasuhiro Matsumoto,
            closes #7021)
diff --git a/src/version.c b/src/version.c
index 49ce61c..03765bf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1747,
+/**/
     1746,
 /**/
     1745,