Before:
  runtime ale_linters/erlang/syntaxerl.vim

After:
  call ale#linter#Reset()

Execute (Handle SyntaxErl output):
  AssertEqual
  \ [
  \   {
  \     'lnum': 42,
  \     'text': "syntax error before: ','",
  \     'type': 'E',
  \   },
  \   {
  \     'lnum': 42,
  \     'text': 'function foo/0 is unused',
  \     'type': 'W',
  \   },
  \ ],
  \ ale_linters#erlang#syntaxerl#Handle(bufnr(''), [
  \   "/tmp/v2wDixk/1/module.erl:42: syntax error before: ','",
  \   '/tmp/v2wDixk/2/module.erl:42: warning: function foo/0 is unused',
  \ ])