ipython/ipython — pull request #6539 by minrk (2014-09-24 22:29:06+00:00)
Title: fix typo in KernelSpec flag

caused `--system` to have no effect.

hooray for silent failures!

Also use `sys.exit(OSError)`, which displays a nice informative error message on stderr before exiting with non-zero exit code.

Who knew?