Merge pull request #151 from keith/ks/pylint

Add pylint formatter

ale_linters/python/pylint.vim

@@ -0,0 +1,9 @@
+" Author: keith <k@keith.so>
+" Description: pylint for python files
+
+call ale#linter#Define('python', {
+\   'name': 'pylint',
+\   'executable': 'pylint',
+\   'command': g:ale#util#stdin_wrapper . ' .py pylint --output-format text --msg-template="{path}:{line}:{column}: {msg_id} {msg}" --reports n',
+\   'callback': 'ale#handlers#HandlePEP8Format',
+\})

autoload/ale/handlers.vim

@@ -4,7 +4,7 @@ scriptencoding utf-8
 "   linter which outputs warnings and errors in a format accepted by one of
 "   these functions can simply use one of these pre-defined error handlers.
 
-let s:path_pattern = '[a-zA-Z]\?\\\?:\?[[:alnum:]/\.-]\+'
+let s:path_pattern = '[a-zA-Z]\?\\\?:\?[[:alnum:]/\.\-_]\+'
 
 function! s:HandleUnixFormat(buffer, lines, type) abort
     " Matches patterns line the following: