Use explicit scope in all ale_linters

vint -s is now clean

ale_linters/php/phpcs.vim

@@ -8,46 +8,46 @@ endif
 let g:loaded_ale_linters_php_phpcs = 1
 
 function! ale_linters#php#phpcs#GetCommand(buffer)
-    let command = 'phpcs -s --report=emacs --stdin-path=%s'
+    let l:command = 'phpcs -s --report=emacs --stdin-path=%s'
 
     " This option can be set to change the standard used by phpcs
     if exists('g:ale_php_phpcs_standard')
-        let command .= ' --standard=' . g:ale_php_phpcs_standard
+        let l:command .= ' --standard=' . g:ale_php_phpcs_standard
     endif
 
-    return command
+    return l:command
 endfunction
 
 function! ale_linters#php#phpcs#Handle(buffer, lines)
     " Matches against lines like the following:
     "
     " /path/to/some-filename.php:18:3: error - Line indented incorrectly; expected 4 spaces, found 2 (Generic.WhiteSpace.ScopeIndent.IncorrectExact)
-    let pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\) - \(.\+\) \(\(.\+\)\)$'
-    let output = []
+    let l:pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\) - \(.\+\) \(\(.\+\)\)$'
+    let l:output = []
 
-    for line in a:lines
-        let l:match = matchlist(line, pattern)
+    for l:line in a:lines
+        let l:match = matchlist(l:line, l:pattern)
 
         if len(l:match) == 0
             continue
         endif
 
-        let text = l:match[4]
-        let type = l:match[3]
+        let l:text = l:match[4]
+        let l:type = l:match[3]
 
         " vcol is Needed to indicate that the column is a character.
-        call add(output, {
+        call add(l:output, {
         \   'bufnr': a:buffer,
         \   'lnum': l:match[1] + 0,
         \   'vcol': 0,
         \   'col': l:match[2] + 0,
-        \   'text': text,
-        \   'type': type ==# 'warning' ? 'W' : 'E',
+        \   'text': l:text,
+        \   'type': l:type ==# 'warning' ? 'W' : 'E',
         \   'nr': -1,
         \})
     endfor
 
-    return output
+    return l:output
 endfunction
 
 call ale#linter#Define('php', {