[issue42668] re.escape does not correctly escape newlines

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

> If the escape-result still contains a verbatim newline, why escape this character at all?

Because in verbose mode it is ignored. This is why \n and other ASCII whitespace characters, and '#', which starts a comment, should be escaped.

'\\\n' and '\\n' has identical meaning independent of mode and context, so there is no bug here. Escaping '\n' as '\\\n' is slightly simpler.

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nosy: +serhiy.storchaka

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<https://bugs.python.org/issue42668>
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