Update namespace.clj

[niquola]

io/resource may return nil in some situations (in my case it was emacs recovery file)

[vemv]

Hi! Thanks for the contribution. Could you describe the problem being solved?

Thanks - V

[bbatsov]

Some background. I'm also not sure when exactly this problem manifests. We'll need some unit tests covering this scenario as well.

[vemv]

In any case, maybe the fix could be moved to misc/clj-file?

I'll have a calmer look at the screenshots

[vemv]

I pushed the fix directly to master out of muscle memory, sorry.

It's essentially the same, with some bonus performance considerations.

If you can pass us an exact emacs recovery file (just the filename, absolute), we'd be happy to add it to the test suite.