[issue38582] re: backreference number in replace string can't >= 100

[Matthew Barnett]

Matthew Barnett <python at mrabarnett.plus.com> added the comment:

A numeric escape of 3 digits is an octal (base 8) escape; the octal escape "\100" gives the same character as the hexadecimal escape "\x40".

In a replacement template, you can use "\g<100>" if you want group 100 because \g<...> accepts both numeric and named group references.

However, \g<...> is not accepted in a pattern.

(By the way, in the "regex" module I added support for it in a pattern too.)

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