Added a test for Math.erf
Added a test for Math.erf

topazproject/topaz,babelsberg/babelsberg-r,kachick/topaz,topazproject/topaz,babelsberg/babelsberg-r,kachick/topaz,babelsberg/babelsberg-r,topazproject/topaz,babelsberg/babelsberg-r,babelsberg/babelsberg-r,kachick/topaz,topazproject/topaz