Before:
  runtime ale_linters/cpp/cpplint.vim

Execute(cpplint warnings from included files should be parsed correctly):

  AssertEqual
  \ [
  \   {
  \     'lnum': 5,
  \     'col': 0,
  \     'text': ' Estra space after ( in function call [whitespace/parents] [4]',
  \     'type': 'W',
  \   },
  \   {
  \     'lnum': 120,
  \     'col': 0,
  \     'text': ' At least two spaces is best between code and comments  [whitespace/comments] [2]',
  \     'type': 'W',
  \   },
  \ ],
  \ ale#handlers#cpplint#HandleCppLintFormat(347, [
  \   'test.cpp:5:  Estra space after ( in function call [whitespace/parents] [4]',
  \   'keymap_keys.hpp:120:  At least two spaces is best between code and comments  [whitespace/comments] [2]',
  \ ])

After:
  call ale#linter#Reset()