Bug 1192957 - Add isort v4.2.2 to dev.txt
Bug 1192957 - Add isort v4.2.2 to dev.txt

https://github.com/timothycrosley/isort

wlach/treeherder,sylvestre/treeherder,glenn124f/treeherder,parkouss/treeherder,gbrmachado/treeherder,akhileshpillai/treeherder,sylvestre/treeherder,sylvestre/treeherder,kapy2010/treeherder,edmorley/treeherder,akhileshpillai/treeherder,wlach/treeherder,tojon/treeherder,avih/treeherder,glenn124f/treeherder,tojonmz/treeherder,akhileshpillai/treeherder,akhileshpillai/treeherder,adusca/treeherder,kapy2010/treeherder,avih/treeherder,akhileshpillai/treeherder,edmorley/treeherder,tojon/treeherder,tojonmz/treeherder,tojon/treeherder,adusca/treeherder,adusca/treeherder,edmorley/treeherder,tojonmz/treeherder,avih/treeherder,KWierso/treeherder,edmorley/treeherder,tojonmz/treeherder,gbrmachado/treeherder,gbrmachado/treeherder,wlach/treeherder,adusca/treeherder,parkouss/treeherder,adusca/treeherder,tojonmz/treeherder,wlach/treeherder,glenn124f/treeherder,KWierso/treeherder,kapy2010/treeherder,kapy2010/treeherder,akhileshpillai/treeherder,gbrmachado/treeherder,sylvestre/treeherder,parkouss/treeherder,tojonmz/treeherder,gbrmachado/treeherder,adusca/treeherder,sylvestre/treeherder,glenn124f/treeherder,kapy2010/treeherder,wlach/treeherder,avih/treeherder,glenn124f/treeherder,KWierso/treeherder,avih/treeherder,parkouss/treeherder,glenn124f/treeherder,wlach/treeherder,gbrmachado/treeherder,tojon/treeherder,avih/treeherder,KWierso/treeherder,sylvestre/treeherder,parkouss/treeherder,parkouss/treeherder