patch 8.2.1688: increment/decrement removes text property

Problem:    Increment/decrement removes text property.
Solution:   Insert the new number before deleting the old one. (closes #6962)
diff --git a/src/version.c b/src/version.c
index 0d0eaa5..23006e1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1688,
+/**/
     1687,
 /**/
     1686,