Before:
  runtime ale_linters/ada/gcc.vim

After:
  call ale#linter#Reset()

Execute(The gcc handler for Ada should parse input correctly):
  AssertEqual
  \ [
  \   {
  \     'bufnr': 0,
  \     'lnum': 8,
  \     'col': 5,
  \     'type': 'W',
  \     'text': 'variable "X" is assigned but never read',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 6,
  \     'col': 22,
  \     'type': 'E',
  \     'text': 'type definition expected',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 8,
  \     'col': 9,
  \     'type': 'E',
  \     'text': 'aspect specifications not allowed here',
  \   },
  \ ],
  \ ale_linters#ada#gcc#Handle(0, [
  \   'foobar.adb:8:05: warning: variable "X" is assigned but never read',
  \   'foobar.ads:6:22: type definition expected',
  \   'foobar.ads:8:09: aspect specifications not allowed here',
  \ ])