Non-breaking space in a map's keyword string

[mtruyens]

I'm a big fan of this library, many thanks!

I just stumbled over the following small issue: a "non-breaking space" in a string-key of a map produces

Execution error (NullPointerException) at codax.pathwise/eval9604$fn$fn$fn$fn (pathwise.clj:136).
Cannot invoke "Object.toString()" because "s" is null

[dscarpetti]

Glad it's been useful! I missed this until now, but I'd like to try and address it. I am having trouble reproducing the issue, if you have a chance could you post a snippet that triggers the exception?