fixed regular expressions for improving performance

[eukub]

Please review the following checklist.

• Docstrings on all new or modified functions / classes
• Updated documentation
• Updated CHANGELOG.md (where appropriate)

[rodrigogiraoserrao]

Hey there, thanks for your PR!

If your change improved performance, can you share the benchmark(s) you ran / by how much did performance improve?

Also, if I'm reading the docs correctly, \w is only equivalent to [a-zA-Z0-9_] if we use the flag re.ASCII and it doesn't look like we are, right?

[rodrigogiraoserrao]

I was looking around and your PR might be a good idea, not from the point of view of performance, but to allow Unicode characters in class names, CSS IDs, variables, etc.
We won't push this forward right now because we want to consider the possible ramifications of making this change carefully.

We'll get back to you!

[eukub]

I was looking around and your PR might be a good idea, not from the point of view of performance, but to allow Unicode characters in class names, CSS IDs, variables, etc. We won't push this forward right now because we want to consider the possible ramifications of making this change carefully.

We'll get back to you!

Great! :)