fix typo in examples
fix typo in examples

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