alternating string replace: Extended input (Long).

[Paddy]

On Jan 9, 8:47 pm, bearophileH... at lycos.com wrote:
> Donald 'Paddy' McCarthy:
>
> [... lots and lots and lots of tests...]
>
> C'mon Paddy, where are the timings too? Are you becoming lazy
> lately? ;-)
>
> Bear bugs,
> bearophile

Get it right before you get it fast. But what is 'right'.