Before:
  runtime ale_linters/verilog/slang.vim

After:
  call ale#linter#Reset()

Execute(The slang handler should parse lines correctly):
  AssertEqual
  \ [
  \    {
  \      'filename' : 'foo.sv',
  \      'lnum': 11,
  \      'col': 1,
  \      'type': 'W',
  \      'text': 'extra '';'' has no effect [-Wempty-member]',
  \    },
  \    {
  \      'filename' : 'bar.sv',
  \      'lnum': 24,
  \      'col': 12,
  \      'type': 'E',
  \      'text': 'cannot mix continuous and procedural assignments to variable ''data_o''',
  \    },
  \ ],
  \ ale_linters#verilog#slang#Handle(bufnr(''), [
  \ 'foo.sv:11:1: warning: extra '';'' has no effect [-Wempty-member]',
  \ 'bar.sv:24:12: error: cannot mix continuous and procedural assignments to variable ''data_o''',
  \ ])
