patch 9.0.0971: escape sequences not recognized without termresponse feature

Problem:    Escape sequences not recognized without the termresponse feature.
Solution:   Recognize escape sequences to avoid display mess up.
diff --git a/src/version.c b/src/version.c
index 7ac20cd..e625792 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    971,
+/**/
     970,
 /**/
     969,