[stylus mode] New version

[dmitrykiselyov]

Better auto-indent and highlighting.

[marijnh]

I've merged this as fc2def3 and 866934b

Next time, please start from my version of the code, instead of simply continuing on your own old branch. That makes it easier for me to merge, and makes sure you actually get the code I merged. I've made a bunch of adjustments to code style, and made the linter pass. I'm not going to do that a 3rd time for this code.

[dmitrykiselyov]

Ok. Thanks for the adjustments to code style. How to run bin/lint?
I'll improve my knowledge of git and the next pull request will be shine ✨

[marijnh]

You need to install node, then run npm install in the CodeMirror directory, and then bin/lint should run.

[dmitrykiselyov]

Thanks 👍
I think that with the $ sign ($ bin/lint) will be more obvious for Windows users 😄