Martin v. Löwis wrote:
Certainly, the doc string is wrong:
isub(a, b) -- Same as a -= b.
That's not quite the same - you would have to write
a = isub(a, b) -- Same as a -= b.
It seems a perfectly fine solution is simply to fix the docstring,
exactly like that:
a = isub(a, b) -- Same as a -= b.
This both corrects the error when using isub with immutable types and
educates user as to how a -= b actually works.
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