The incompatibility of rust-mode with global-whitespace-mode warned
about in the README was actually fixed by commit
581b3db3b3. Remove the
warning from the README and close #3994.
[ERT](http://www.gnu.org/software/emacs/manual/html_node/ert/index.html).
You can use `run_rust_emacs_tests.sh` to run them in batch mode, if
Emacs is somewhere in your `$PATH`.
-
-### Known bugs
-
-* Combining `global-whitespace-mode` and `rust-mode` is generally glitchy.
- See [Issue #3994](https://github.com/mozilla/rust/issues/3994).