Add assert_no_warning
Add assert_no_warning

to test for absence of a warning

jakeatwork/brakeman,jlecour/brakeman,spcoder/brakeman,jeffyip/brakeman,bf4/brakeman,kbrock/brakeman,cheerfulstoic/brakeman,cheerfulstoic/brakeman,masarakki/brakeman,codeclimate/brakeman-deprecated,lee-leon/brakeman,liqites/brakeman,bf4/brakeman,lee-leon/brakeman,cheerfulstoic/brakeman,liqites/brakeman,kbrock/brakeman,dfens/brakeman,lee-leon/brakeman,kbrock/brakeman,htdc/brakeman,jakeatwork/brakeman,codeclimate/brakeman-deprecated,github/brakeman,PragTob/brakeman,PragTob/brakeman,oreoshake/brakeman,dfens/brakeman,htdc/brakeman,jakeatwork/brakeman,dfens/brakeman,jeffyip/brakeman,liqites/brakeman,masarakki/brakeman,htdc/brakeman,jlecour/brakeman,bf4/brakeman,jlecour/brakeman,spcoder/brakeman,spcoder/brakeman,oreoshake/brakeman,masarakki/brakeman,github/brakeman