Before:
  runtime ale_linters/v/v.vim

After:
  call ale#linter#Reset()

Execute (The v handler should correctly parse error messages):
  AssertEqual
  \ [{
  \   'lnum': 4,
  \   'col': 3,
  \   'filename': ale#path#GetAbsPath(expand('%:p:h'), 'const ants.v'),
  \   'type': 'W',
  \   'end_col': 14,
  \   'text': 'const names cannot contain uppercase letters, use snake_case instead'
  \ },
  \ {
  \   'lnum': 4,
  \   'col': 8,
  \   'filename': ale#path#GetAbsPath(expand('%:p:h'), 'main.v'),
  \   'type': 'W',
  \   'end_col': 10,
  \   'text': 'module "os" is imported but never used'
  \ },
  \ {
  \   'lnum': 20,
  \   'col': 10,
  \   'filename': ale#path#GetAbsPath(expand('%:p:h'), 'main.v'),
  \   'type': 'E',
  \   'end_col': 18,
  \   'text': 'undefined ident: `win_widt`'
  \ }],
  \ ale_linters#v#v#Handler('', [
  \   './const ants.v:4:3: warning: const names cannot contain uppercase letters, use snake_case instead',
  \   '    2 |',
  \   '    3 | const (',
  \   '    4 |   BUTTON_TEXT = "OK"',
  \   '      |   ~~~~~~~~~~~',
  \   '    5 | )',
  \   './main.v:4:8: warning: module "os" is imported but never used',
  \   '    2 |',
  \   '    3 | import ui',
  \   '    4 | import os',
  \   '      |        ~~',
  \   '    5 |',
  \   '    6 | const (',
  \   './main.v:20:10: error: undefined ident: `win_widt`',
  \   '   18 |     mut app := &App{}',
  \   '   19 |     app.window = ui.window({',
  \   '   20 |         width: win_widt',
  \   '      |                ~~~~~~~~',
  \   '   21 |         height: win_height',
  \   '   22 |         title: "Counter"',
  \ ])