patch 8.0.0360: sometimes VimL is used instead of "Vim script"

Problem:    Sometimes VimL is used, which is confusing.
Solution:   Consistently use "Vim script". (Hirohito Higashi)
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 33490b6..0c0a197 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -147,7 +147,7 @@
 let s:errors = []
 let s:messages = []
 let s:skipped = []
-if expand('%') =~ 'test_viml.vim'
+if expand('%') =~ 'test_vimscript.vim'
   " this test has intentional s:errors, don't use try/catch.
   source %
 else