PolynomialRing.from_FractionField: added docstring and tests
PolynomialRing.from_FractionField: added docstring and tests

Conflicts:

	sympy/polys/tests/test_algebratools.py

Signed-off-by: Mateusz Paprocki <4e51c28eba28c1534bcc4a6bd2cccd314d8bf749@gmail.com>

liangjiaxing/sympy,abloomston/sympy,asm666/sympy,yukoba/sympy,cswiercz/sympy,sampadsaha5/sympy,Vishluck/sympy,toolforger/sympy,debugger22/sympy,atreyv/sympy,lidavidm/sympy,bukzor/sympy,postvakje/sympy,garvitr/sympy,wanglongqi/sympy,souravsingh/sympy,ga7g08/sympy,abloomston/sympy,sahilshekhawat/sympy,dqnykamp/sympy,moble/sympy,jamesblunt/sympy,sunny94/temp,ChristinaZografou/sympy,flacjacket/sympy,abhiii5459/sympy,MridulS/sympy,Arafatk/sympy,Sumith1896/sympy,wyom/sympy,iamutkarshtiwari/sympy,chaffra/sympy,pbrady/sympy,shikil/sympy,farhaanbukhsh/sympy,MridulS/sympy,MechCoder/sympy,souravsingh/sympy,minrk/sympy,ChristinaZografou/sympy,rahuldan/sympy,Shaswat27/sympy,hrashk/sympy,bukzor/sympy,asm666/sympy,maniteja123/sympy,Davidjohnwilson/sympy,kaichogami/sympy,Mitchkoens/sympy,rahuldan/sympy,iamutkarshtiwari/sympy,Shaswat27/sympy,minrk/sympy,wanglongqi/sympy,sahmed95/sympy,AunShiLord/sympy,VaibhavAgarwalVA/sympy,liangjiaxing/sympy,yukoba/sympy,srjoglekar246/sympy,mafiya69/sympy,yashsharan/sympy,jerli/sympy,jbbskinny/sympy,beni55/sympy,kumarkrishna/sympy,MechCoder/sympy,sahmed95/sympy,AunShiLord/sympy,drufat/sympy,shikil/sympy,chaffra/sympy,madan96/sympy,cccfran/sympy,Arafatk/sympy,Vishluck/sympy,Sumith1896/sympy,Davidjohnwilson/sympy,lidavidm/sympy,skidzo/sympy,VaibhavAgarwalVA/sympy,Gadal/sympy,yashsharan/sympy,kmacinnis/sympy,Arafatk/sympy,sahilshekhawat/sympy,postvakje/sympy,meghana1995/sympy,AunShiLord/sympy,Curious72/sympy,cccfran/sympy,kmacinnis/sympy,abloomston/sympy,liangjiaxing/sympy,shipci/sympy,shipci/sympy,amitjamadagni/sympy,atsao72/sympy,mafiya69/sympy,mcdaniel67/sympy,lindsayad/sympy,Designist/sympy,jaimahajan1997/sympy,Designist/sympy,sampadsaha5/sympy,dqnykamp/sympy,ahhda/sympy,meghana1995/sympy,Shaswat27/sympy,jerli/sympy,grevutiu-gabriel/sympy,wanglongqi/sympy,jamesblunt/sympy,ga7g08/sympy,oliverlee/sympy,pbrady/sympy,Vishluck/sympy,ga7g08/sympy,emon10005/sympy,Designist/sympy,ahhda/sympy,pandeyadarsh/sympy,Mitchkoens/sympy,skidzo/sympy,cswiercz/sympy,kmacinnis/sympy,iamutkarshtiwari/sympy,oliverlee/sympy,amitjamadagni/sympy,kevalds51/sympy,vipulroxx/sympy,kaushik94/sympy,farhaanbukhsh/sympy,kumarkrishna/sympy,shikil/sympy,yashsharan/sympy,souravsingh/sympy,sunny94/temp,vipulroxx/sympy,hargup/sympy,AkademieOlympia/sympy,skidzo/sympy,lindsayad/sympy,hargup/sympy,oliverlee/sympy,asm666/sympy,jaimahajan1997/sympy,kevalds51/sympy,saurabhjn76/sympy,pandeyadarsh/sympy,mcdaniel67/sympy,jamesblunt/sympy,kaushik94/sympy,cswiercz/sympy,grevutiu-gabriel/sympy,rahuldan/sympy,bukzor/sympy,drufat/sympy,moble/sympy,atsao72/sympy,kaushik94/sympy,debugger22/sympy,Gadal/sympy,madan96/sympy,lindsayad/sympy,garvitr/sympy,aktech/sympy,AkademieOlympia/sympy,debugger22/sympy,skirpichev/omg,maniteja123/sympy,vipulroxx/sympy,drufat/sympy,cccfran/sympy,ahhda/sympy,yukoba/sympy,saurabhjn76/sympy,kevalds51/sympy,hrashk/sympy,wyom/sympy,jbbskinny/sympy,maniteja123/sympy,saurabhjn76/sympy,atreyv/sympy,kaichogami/sympy,farhaanbukhsh/sympy,moble/sympy,grevutiu-gabriel/sympy,Titan-C/sympy,Sumith1896/sympy,toolforger/sympy,lidavidm/sympy,aktech/sympy,dqnykamp/sympy,aktech/sympy,shipci/sympy,MridulS/sympy,pbrady/sympy,Curious72/sympy,emon10005/sympy,sahmed95/sympy,Gadal/sympy,kumarkrishna/sympy,mcdaniel67/sympy,Titan-C/sympy,meghana1995/sympy,diofant/diofant,beni55/sympy,chaffra/sympy,ChristinaZografou/sympy,sunny94/temp,pandeyadarsh/sympy,toolforger/sympy,mafiya69/sympy,MechCoder/sympy,postvakje/sympy,Mitchkoens/sympy,jbbskinny/sympy,hargup/sympy,atreyv/sympy,abhiii5459/sympy,Titan-C/sympy,kaichogami/sympy,hrashk/sympy,sampadsaha5/sympy,madan96/sympy,abhiii5459/sympy,sahilshekhawat/sympy,emon10005/sympy,VaibhavAgarwalVA/sympy,beni55/sympy,garvitr/sympy,atsao72/sympy,jerli/sympy,Curious72/sympy,jaimahajan1997/sympy,AkademieOlympia/sympy,Davidjohnwilson/sympy,wyom/sympy