i don't understand this RE example from the documentation

John Salerno johnjsal at NOSPAMgmail.com
Tue May 9 16:13:27 CEST 2006

Ben Cartwright wrote:

> The groups *are* 0-based.  The 0th group is the whole match, e.g.:

Ah, I see! But I also read that if a group number starts with 0, it is 
treated as octal. Did I read that wrong, or maybe it doesn't matter 
since 0 is 0 in any base system?

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