[dokuwiki] Eliminating PHP Error Notices?

What's the feeling (especially from Andi) about eliminating the code
which generates PHP Error notices?

A pros and cons as I see it;

- Con: code will get less elegant in some places, where extra checks
need to be added to make sure an array key exists etc.

- Pro: switching on E_NOTICE messages is something like "use strict;"
in Perl. "Good practice" although that in itself isn't a necassily a
reason. Do know there are people who want use an application that's
emitting E_NOTICEs.

- Pro: a real advantage - it's often alot easier to find / prevent
bugs when E_NOTICE is on. I've lost count of the number of times where
an E_NOTICE saved has me very long bug hunt.
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