Fix pretty printing of doc comments in macros.

[ghost]

Fixes #27489.

[rust-highfive]

r? @nrc

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[barosl]

Oops, you already did this!

I also implemented this myself, but in a slightly different way. Instead of always adding one more #, my algorithm searches for the pattern "#* and calculates the minimum number of #s required. So a simple case like /// Hello world is directly converted to r"Hello world", not r#"Hello world"#, and something like /// ## is also translated to r"##", rather than r###"##"###. I think the generated raw strings are a bit clearer in this way.

You can see the code here: barosl@f6504aa

Would you mind closing this? I'll open mine. Sorry for not telling this earlier. 😢

[ghost]

Sure thing :)

P.S. Line 1121 in your solution will fail make tidy because it's over 100 chars.

[barosl]

Thanks for your understanding! Also, nice catch. I will fix that.