Documentation: Unclear documentation for PoincareRelations

[gokul-uf]

Description

The documentation for PoincareRelations specifies that the input should be a file with one relation per line. In case the relation is assymetric (as is the case with hypernymy) it is not clear whether the pairs should be
a. (u, v) where u is a v ex. u = cat, v = mammal
b. (u, v) where v is a u ex. u = mammal, v = cat

This maybe clear to people working in this area, but a bit confusing to people just starting with PoincareModel.

Thanks!

[gokul-uf]

Update: From https://github.com/RaRe-Technologies/gensim/blob/920c029ca97f961c8df264672c34936607876694/gensim/test/test_data/poincare_hypernyms_large.tsv it is clear the relations should be of form u is a v. It would be better to mention a link to the above in the documentation itself :)

[menshikh-iv]

Thanks for report @gokul-uf 👍

[menshikh-iv]

Fixed by #2357