Before:
  runtime ale_linters/rstcheck/rstcheck.vim

After:
  call ale#linter#Reset()

Execute(Warning and error messages should be handled correctly):
  AssertEqual
  \ [
  \   {
  \      'filename': ale#path#Simplify(expand('%:p:h') . '/bad_python.rst'),
  \      'lnum': 7,
  \      'col': 0,
  \      'type': 'W',
  \      'text': '(python) unexpected EOF while parsing',
  \   },
  \   {
  \      'filename': ale#path#Simplify(expand('%:p:h') . '/bad_cpp.rst'),
  \      'lnum': 9,
  \      'col': 0,
  \      'type': 'W',
  \      'text': '(cpp) error: ''x'' was not declared in this scope',
  \   },
  \   {
  \      'filename': ale#path#Simplify(expand('%:p:h') . '/bad_rst.rst'),
  \      'lnum': 1,
  \      'col': 0,
  \      'type': 'E',
  \      'text': 'Title overline & underline mismatch.',
  \   },
  \ ],
  \ ale_linters#rst#rstcheck#Handle(1, [
  \   'bad_python.rst:7: (ERROR/3) (python) unexpected EOF while parsing',
  \   'bad_cpp.rst:9: (ERROR/3) (cpp) error: ''x'' was not declared in this scope',
  \   'bad_rst.rst:1: (SEVERE/4) Title overline & underline mismatch.',
  \])