patch 8.0.0202: no test for invalid syntax group name

Problem:    No test for invalid syntax group name.
Solution:   Add a test for group name error and warning.
diff --git a/src/testdir/test_syntax.vim b/src/testdir/test_syntax.vim
index 232da75..8a00f99 100644
--- a/src/testdir/test_syntax.vim
+++ b/src/testdir/test_syntax.vim
@@ -335,3 +335,14 @@
   hi clear Foo
   hi clear Bar
 endfunc
+
+func Test_invalid_name()
+  syn clear
+  syn keyword Nop yes
+  call assert_fails("syntax keyword Wr\x17ong bar", 'E669:')
+  syntax keyword @Wrong bar
+  call assert_match('W18:', execute('1messages'))
+  syn clear
+  hi clear Nop
+  hi clear @Wrong
+endfunc
diff --git a/src/version.c b/src/version.c
index 8184b66..4ef7f4f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    202,
+/**/
     201,
 /**/
     200,