typing: add hints to `mercurial.util.mktempcopy()`
Might as well, now that the previous commit indicated what types are required.
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BreakBeforeBraces: Linux
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IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2