More refactoring for test_generators
More refactoring for test_generators

- list comprehensions for distill_articles/pages
- distill articles only once
- pep8

douglaskastle/pelican,deanishe/pelican,ls2uper/pelican,GiovanniMoretti/pelican,number5/pelican,51itclub/pelican,HyperGroups/pelican,number5/pelican,UdeskDeveloper/pelican,florianjacob/pelican,koobs/pelican,lucasplus/pelican,simonjj/pelican,ionelmc/pelican,zackw/pelican,51itclub/pelican,0xMF/pelican,florianjacob/pelican,Polyconseil/pelican,btnpushnmunky/pelican,farseerfc/pelican,lucasplus/pelican,jvehent/pelican,garbas/pelican,TC01/pelican,ls2uper/pelican,rbarraud/pelican,gymglish/pelican,joetboole/pelican,lazycoder-ru/pelican,UdeskDeveloper/pelican,levanhien8/pelican,deved69/pelican-1,catdog2/pelican,alexras/pelican,number5/pelican,avaris/pelican,ingwinlu/pelican,garbas/pelican,JeremyMorgan/pelican,Summonee/pelican,ls2uper/pelican,Scheirle/pelican,deanishe/pelican,treyhunner/pelican,jvehent/pelican,alexras/pelican,Scheirle/pelican,zackw/pelican,janaurka/git-debug-presentiation,koobs/pelican,Rogdham/pelican,abrahamvarricatt/pelican,jimperio/pelican,ehashman/pelican,eevee/pelican,karlcow/pelican,TC01/pelican,catdog2/pelican,rbarraud/pelican,eevee/pelican,rbarraud/pelican,GiovanniMoretti/pelican,kennethlyn/pelican,goerz/pelican,jimperio/pelican,ingwinlu/pelican,avaris/pelican,eevee/pelican,jo-tham/pelican,crmackay/pelican,catdog2/pelican,koobs/pelican,iurisilvio/pelican,ehashman/pelican,Scheirle/pelican,talha131/pelican,51itclub/pelican,JeremyMorgan/pelican,karlcow/pelican,sunzhongwei/pelican,getpelican/pelican,Rogdham/pelican,deved69/pelican-1,11craft/pelican,sunzhongwei/pelican,sunzhongwei/pelican,btnpushnmunky/pelican,UdeskDeveloper/pelican,HyperGroups/pelican,kernc/pelican,douglaskastle/pelican,HyperGroups/pelican,lazycoder-ru/pelican,deanishe/pelican,jvehent/pelican,talha131/pelican,abrahamvarricatt/pelican,btnpushnmunky/pelican,kernc/pelican,kennethlyn/pelican,janaurka/git-debug-presentiation,alexras/pelican,crmackay/pelican,11craft/pelican,douglaskastle/pelican,lucasplus/pelican,treyhunner/pelican,janaurka/git-debug-presentiation,kernc/pelican,levanhien8/pelican,11craft/pelican,florianjacob/pelican,Rogdham/pelican,simonjj/pelican,arty-name/pelican,getpelican/pelican,iKevinY/pelican,simonjj/pelican,kennethlyn/pelican,jimperio/pelican,karlcow/pelican,ehashman/pelican,Polyconseil/pelican,joetboole/pelican,iurisilvio/pelican,goerz/pelican,goerz/pelican,gymglish/pelican,justinmayer/pelican,Summonee/pelican,deved69/pelican-1,garbas/pelican,sunzhongwei/pelican,treyhunner/pelican,joetboole/pelican,GiovanniMoretti/pelican,crmackay/pelican,iurisilvio/pelican,levanhien8/pelican,JeremyMorgan/pelican,jo-tham/pelican,zackw/pelican,Summonee/pelican,iKevinY/pelican,gymglish/pelican,lazycoder-ru/pelican,abrahamvarricatt/pelican,TC01/pelican,farseerfc/pelican