Before:
  runtime ale_linters/desktop/desktop_file_validate.vim

After:
  call ale#linter#Reset()

Execute(The desktop-file-validate handler should parse lines correctly):
  AssertEqual
  \ [
  \   {
  \     'lnum': 1,
  \     'col': 1,
  \     'type': 'W',
  \     'text': 'key "TerminalOptions" in group "Desktop Entry" is deprecated',
  \   },
  \   {
  \     'lnum': 1,
  \     'col': 1,
  \     'type': 'E',
  \     'text': 'action "new-private-window" is defined, but there is no matching "Desktop Action new-private-window" group',
  \   },
  \ ],
  \ ale_linters#desktop#desktop_file_validate#Handle(bufnr(''), [
  \   'foo.desktop: warning: key "TerminalOptions" in group "Desktop Entry" is deprecated',
  \   'foo.desktop: error: action "new-private-window" is defined, but there is no matching "Desktop Action new-private-window" group',
  \ ])