sort strings by interpreting them as integrals

[bearophile]

Jonathan M Davis:

> Otherwise, wouldn't _100 come before _20?

But he has said:

> I need to treat these as if they were integrals, although the
> underscore complicates things here since it should be ignored. 
> So the result I want is:
> ["_10", "_20", "_100"]

No mention of 100 coming before 20.

Bye,
bearophile