doc tweaks
doc tweaks

pdufour/sqlalchemy,bdupharm/sqlalchemy,monetate/sqlalchemy,hsum/sqlalchemy,Akrog/sqlalchemy,itkovian/sqlalchemy,davidjb/sqlalchemy,EvaSDK/sqlalchemy,brianv0/sqlalchemy,dstufft/sqlalchemy,itkovian/sqlalchemy,bdupharm/sqlalchemy,wujuguang/sqlalchemy,elelianghh/sqlalchemy,EvaSDK/sqlalchemy,hsum/sqlalchemy,WinterNis/sqlalchemy,sqlalchemy/sqlalchemy,ThiefMaster/sqlalchemy,inspirehep/sqlalchemy,brianv0/sqlalchemy,graingert/sqlalchemy,wfxiang08/sqlalchemy,Cito/sqlalchemy,davidfraser/sqlalchemy,sandan/sqlalchemy,Cito/sqlalchemy,bootandy/sqlalchemy,robin900/sqlalchemy,epa/sqlalchemy,halfcrazy/sqlalchemy,dstufft/sqlalchemy,graingert/sqlalchemy,j5int/sqlalchemy,robin900/sqlalchemy,olemis/sqlalchemy,ThiefMaster/sqlalchemy,halfcrazy/sqlalchemy,Cito/sqlalchemy,olemis/sqlalchemy,276361270/sqlalchemy,WinterNis/sqlalchemy,zzzeek/sqlalchemy,bootandy/sqlalchemy,inspirehep/sqlalchemy,wujuguang/sqlalchemy,alex/sqlalchemy,alex/sqlalchemy,davidjb/sqlalchemy,monetate/sqlalchemy,elelianghh/sqlalchemy,276361270/sqlalchemy,sandan/sqlalchemy,j5int/sqlalchemy,Akrog/sqlalchemy,davidfraser/sqlalchemy,pdufour/sqlalchemy,wfxiang08/sqlalchemy,alex/sqlalchemy,epa/sqlalchemy