Before:
  runtime ale_linters/vhdl/ghdl.vim

After:
  call ale#linter#Reset()

Execute(The ghdl handler should parse lines correctly):
  AssertEqual
  \ [
  \   {
  \     'lnum': 41,
  \     'col' : 5,
  \     'type': 'E',
  \     'text': "error: 'begin' is expected instead of 'if'"
  \   },
  \   {
  \     'lnum': 12,
  \     'col' : 8,
  \     'type': 'E',
  \     'text': ' no declaration for "i0"'
  \   },
  \ ],
  \ ale_linters#vhdl#ghdl#Handle(bufnr(''), [
  \   "dff_en.vhd:41:5:error: 'begin' is expected instead of 'if'",
  \   '/path/to/file.vhdl:12:8: no declaration for "i0"',
  \ ])