Feature request: Allow literal `#`, `~`, `%`, `$`, `!` symbols in GFM

Currently if you type things like see point #1 above or it'll take ~5 seconds in GitLab-flavored markdown, GitLab will attempt to turn these into links for an issue or a label.

It would be helpful if there were a way to escape these symbols so that they are treated literally by the GFM parser.

I'd imagine something like \# or ## could do the job.