runtime: Fix typos in various files

closes: #12836

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Viktor Szépe <viktor@szepe.net>
diff --git a/runtime/ftplugin/tidy.vim b/runtime/ftplugin/tidy.vim
index 470548d..b81b66d 100644
--- a/runtime/ftplugin/tidy.vim
+++ b/runtime/ftplugin/tidy.vim
@@ -1,5 +1,5 @@
 " Vim filetype plugin file
-" Language:	HMTL Tidy Configuration
+" Language:	HTML Tidy Configuration
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
 " Last Change:	2020 Sep 4