Before:
  runtime ale_linters/swift/swiftlint.vim

After:
  call ale#linter#Reset()

Execute(The swiftint handler should parse error messages correctly):
  AssertEqual
  \ [
  \   {
  \     'lnum': 1,
  \     'col': 7,
  \     'text': 'Operator Usage Whitespace Violation: Operators should be surrounded by a single whitespace when they are being used.',
  \     'code': 'operator_usage_whitespace',
  \     'type': 'W',
  \   },
  \   {
  \     'lnum': 1,
  \     'col': 11,
  \     'text': 'Operator Usage Whitespace Violation: Operators should be surrounded by a single whitespace when they are being used.',
  \     'code': 'operator_usage_whitespace',
  \     'type': 'W',
  \   },
  \
  \ ],
  \ ale_linters#swift#swiftlint#Handle(bufnr(''), [
  \   'This line should be ignored',
  \   '<nopath>:1:7: warning: Operator Usage Whitespace Violation: Operators should be surrounded by a single whitespace when they are being used. (operator_usage_whitespace)',
  \   '<nopath>:1:11: warning: Operator Usage Whitespace Violation: Operators should be surrounded by a single whitespace when they are being used. (operator_usage_whitespace)',
  \ ])