Remove @ mark to fix invalid link in Rules.md

[pixyzehn]

Removed punctuation before replacing whitespace with -.

I took a look at how Github markup works to create named anchors. It said The resulting HTML is rendered on GitHub.com. here.

So, based on what Github markup used before, I followed the way jch/html-pipeline takes. What do you think? Do you have any idea for that?

ref:

• https://stackoverflow.com/questions/53091847/github-markdown-anchor-only-linking-to-top-of-the-page
• https://github.com/jch/html-pipeline/blob/master/lib/html/pipeline/toc_filter.rb#L42

[marcelofabri]

This file is autogenerated, so we need to fix it in code

[marcelofabri]

More specifically, this is done in RuleList+Documentation.swift

[pixyzehn]

@marcelofabri Thank you! Will check the file and try to fix it.

[pixyzehn]

Just updated the description of this PR.

[SwiftLintBot]

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[marcelofabri]

Thanks! 🚀