fix String#+ for non-string arguments
fix String#+ for non-string arguments

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