[scikit-learn] How to deal with minor inconsistencies in scikit source code?

[Ilya Persky]

Hi All!

I'm now reading scikit-learn source code and sometimes meet minor
inconsistencies here and there like unnecessary copying of some array or
some very unimportant race condition. Nothing like serious bug really.

What should I do about it? Create an issue for each case would be an
overkill. Create an issue for all of them and add pull request with fixes?
Or first send a letter with them here?..

Again I'm new to this code and can be easily missing something (something
looking like minor bug could appear to be a feature :) ).

-- 
Thank you,
Ilya.
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