style guide fixes round 1
style guide fixes round 1

aleksandr-bakanov/astropy,dhomeier/astropy,pllim/astropy,larrybradley/astropy,dhomeier/astropy,mhvk/astropy,mhvk/astropy,astropy/astropy,lpsinger/astropy,saimn/astropy,dhomeier/astropy,StuartLittlefair/astropy,larrybradley/astropy,larrybradley/astropy,astropy/astropy,larrybradley/astropy,astropy/astropy,dhomeier/astropy,saimn/astropy,mhvk/astropy,aleksandr-bakanov/astropy,pllim/astropy,saimn/astropy,saimn/astropy,lpsinger/astropy,dhomeier/astropy,lpsinger/astropy,pllim/astropy,pllim/astropy,mhvk/astropy,StuartLittlefair/astropy,pllim/astropy,lpsinger/astropy,astropy/astropy,aleksandr-bakanov/astropy,saimn/astropy,StuartLittlefair/astropy,larrybradley/astropy,mhvk/astropy,aleksandr-bakanov/astropy,astropy/astropy,StuartLittlefair/astropy,lpsinger/astropy,StuartLittlefair/astropy