[issue41605] t = re.sub(".*", "*", src) has different ouput

[Ronald Oussoren]

Ronald Oussoren <ronaldoussoren at mac.com> added the comment:

in 3.6 t == '*', in 3.7 and later it is '**'.

To be honest I don't like the 3.7 behaviour, it is very surprising even if it is technically correct (the first '*' is from a match from the entire string, the second one is from an empty match at the end of the string). 

A workaround is to explicitly anchor the regular expression (for example by adding '^' to the start).

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nosy: +ronaldoussoren

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