patch 9.1.0289: filetype: some TeX files are not recognized

Problem:  filetype: some TeX files are not recognized
Solution: Add more patterns for TeX files and inspect
          a few more files for being TeX files
          (Wu, Zhenyu)

closes: #14456

Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 44f9923..f1c52c5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    289,
+/**/
     288,
 /**/
     287,