Before:
  Save g:ale_pony_ponyc_options

  unlet! g:ale_pony_ponyc_options
  unlet! b:ale_pony_ponyc_options

  runtime ale_linters/pony/ponyc.vim

After:
  Restore
  unlet! b:ale_pony_ponyc_options
  call ale#linter#Reset()

Execute(The options should be used in the command):
  AssertEqual
  \ ale#Escape('ponyc') . ' --pass paint',
  \ ale_linters#pony#ponyc#GetCommand(bufnr(''))

  let b:ale_pony_ponyc_options = 'foobar'

  AssertEqual
  \ ale#Escape('ponyc') . ' foobar',
  \ ale_linters#pony#ponyc#GetCommand(bufnr(''))