Added vim-commentary and updarted the plugins.

commentary:
Comment stuff out.  Use `gcc` to comment out a line (takes a count),
`gc` to comment out the target of a motion (for example, `gcap` to
comment out a paragraph), and `gc` in visual mode to comment out the
selection.  That's it.

sources_non_forked/syntastic/syntax_checkers/c/cppcheck.vim

@@ -28,10 +28,6 @@ endif
 let s:save_cpo = &cpo
 set cpo&vim
 
-function! SyntaxCheckers_c_cppcheck_Preprocess(errors)
-    return map(copy(a:errors), 'substitute(v:val, ''\v^\[[^]]+\]\zs( -\> \[[^]]+\])+\ze:'', "", "")')
-endfunction
-
 function! SyntaxCheckers_c_cppcheck_GetLocList() dict
     let makeprg = self.makeprgBuild({
         \ 'args': syntastic#c#ReadConfig(g:syntastic_cppcheck_config_file),
@@ -50,7 +46,7 @@ function! SyntaxCheckers_c_cppcheck_GetLocList() dict
     let loclist = SyntasticMake({
         \ 'makeprg': makeprg,
         \ 'errorformat': errorformat,
-        \ 'preprocess': 'SyntaxCheckers_c_cppcheck_Preprocess',
+        \ 'preprocess': 'cppcheck',
         \ 'returns': [0] })
 
     for e in loclist