Add textlint for Asciidoc and add it to Fixers

[tani]

I made this patch to run textlint at asciidoc too, and also to work textlint --fix in ALEFix.
Thank you!

[w0rp]

Add tests for the linter here. See #2190.

Add tests for the fixer function. See :help ale-development for documentation on developing and testing ALE code.

[tani]

I got it. However, I think you don't need tests for the linter because the tests are in this repository as for markdown. For example, A linter write-good have just one test for only markdown but write-good covers asciidoc too.

Should I add just the tests for fixer function?

[tani]

I added them.

[w0rp]

Add tests for the linter. You need to use the AssertLinter command. See similar comments in #2190.

[tani]

I say again, you have already the tests, see https://github.com/w0rp/ale/blob/master/test/command_callback/test_textlint_command_callbacks.vader

Perhaps, you say I should add test about AsciiDoc in textlint, but I said write-good and proselint just test only one filetype, they don't test about AsciiDoc.

Therefore I think you can merge this requrest,

Okay I'll try.

[tani]

I'm appriciate you to tell me again, I got what you say. I added it, Please check it,

[w0rp]

Cheers! 🍻