patch 8.1.0665: text property display wrong when 'spell' is set

Problem:    Text property display wrong when 'spell' is set. (Dominique Pelle)
Solution:   Remove unnecessary assignment to char_attr.  Combine attributes if
            needed.  Add a screenshot test.
diff --git a/src/version.c b/src/version.c
index b976ba5..ce53f2e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    665,
+/**/
     664,
 /**/
     663,