Better syntax_map by default, only need 'html' syntax.

Author: aparajita

linter.py

@@ -17,7 +17,7 @@ class HtmlTidy(Linter):
 
     """Provides an interface to tidy."""
 
-    syntax = ('html', 'html 5')
+    syntax = 'html'
     cmd = 'tidy -errors -quiet -utf8'
     regex = r'^line (?P<line>\d+) column (?P<col>\d+) - (?:(?P<error>Error)|(?P<warning>Warning)): (?P<message>.+)'
     error_stream = util.STREAM_STDERR