cubicweb #17218381 improve and fix documentation [resolved]

see https://hg.logilab.org/master/cubicweb/rev/37bfcaa1792d and following commits up to https://hg.logilab.org/master/cubicweb/rev/3eddb5954135

prioritynormal
typeenhancement
done in3.27.0
load left0.000
closed by<not specified>