Added erb support.

Author: aparajita

linter.py

@@ -17,11 +17,12 @@ class Ruby(RubyLinter):
 
     """Provides an interface to ruby -wc."""
 
-    syntax = ('ruby', 'ruby on rails', 'rspec')
+    syntax = ('ruby', 'ruby on rails', 'rspec', 'html (rails)')
     cmd = 'ruby -wc'
     regex = (
         r'^.+?:(?P<line>\d+): (?:(?P<error>.*?error)|(?P<warning>warning))[,:] (?P<message>[^\r\n]+)\r?\n'
         r'(?:^[^\r\n]+\r?\n^(?P<col>.*?)\^)?'
     )
     multiline = True
+    selectors = {'html (rails)': 'source.ruby.rails.embedded.html'}
     comment_re = r'\s*#'