Fixes grammar in docstring.
Fixes grammar in docstring.

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