Consider adding linter that warns about use of unsupported characters in symbol names

[jafingerhut]

See this recent discussion on the topic, for example: https://groups.google.com/forum/#!topic/clojure/CwZHu1Eszbk

I would have to look at the preliminary results of such a new linter on a bunch of Clojure projects to see whether it was so noisy that having it on by default would be useful, or simply annoying.

[jafingerhut]

Arguably the warning should be more severe if there are characters like Unicode's non-breaking space (or other whitespace characters other than the ASCII whitespace characters), because those can lead to very confusing-to-human behavior.

For example, a text editor might show a non-breaking space equivalently to a normal ASCII space, and to a human a sequence of characters would look like two symbols or expressions separated by a normal space, but Clojure would treat it as a single symbol.