cubicweb #4925396 newcube should produce PEP8-compliant code [validation pending]

Currently the generated code is, in many place, non strictly PEP8 compliant.

I think it should.

prioritynormal
typebug
done in3.21.0
load left0.000
closed by#88f60d4b9952 [newcube] Make the generated code PEP-8 compliant
patch[newcube] Make the generated code PEP-8 compliant [applied]