clean: add test for not removing git extensions artifacts
clean: add test for not removing git extensions artifacts

davydovanton/bundler,asutoshpalai/bundler,RochesterinNYC/bundler,dilumnavanjana/bundler,joshsoftware/bundler,mpapis/bundler,bronzdoc/bundler,davydovanton/bundler,bundler/bundler,mpapis/bundler,joshsoftware/bundler,mvz/bundler,asutoshpalai/bundler,pivotal-cf-experimental/bundler,Teino1978-Corp/Teino1978-Corp-bundler,seanlinsley/bundler,bundler/bundler,jingweno/bundler,bronzdoc/bundler,RochesterinNYC/bundler,dilumnavanjana/bundler,Teino1978-Corp/Teino1978-Corp-bundler,seanlinsley/bundler,mvz/bundler,jingweno/bundler,pivotal-cf-experimental/bundler