A bug in Dockerfile

[wangluochao902]

docker-machine-driver-xhyve/vendor/github.com/docker/docker/builder/parser/testfiles-negative/empty-instruction/Dockerfile

Line 3 in 829c096

RUN

Hi, we are developing a tool to detect typos/bugs in dockerfiles automatically. Our tool finds a potential bug above. Is it a bug? we believe it needs a '\' at the end of the line or deleting the new line. Our tool is currently available here https://wangluochao902.github.io/clcheck/