use diagnostics

[stdweird]

See http://perldoc.perl.org/diagnostics.html

Proposal to switch it on on Test::Quattor::Object (so enabled for all unittests), and also add it to the standard PM module template (so enabled for all perl modules that use it).

It's trivial to implement

[jouvin]

See Stackoverflow: http://stackoverflow.com/questions/6397170/is-there-any-problem-with-use-diagnostics. Not necessarily for production use...

[jrha]

Might be a good idea during unittests only.

[ned21]

Also this comment suggests we can pipe the warnings from a logfile to the splain programme to get the same info?