Fix Haml interpolation test
Fix Haml interpolation test

should have been a test that the warning does _not_ appear.

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