Allow spaces in file path for generated Chez programs

[chrrasmussen]

If one try to execute an Idris 2 program (idris2 --exec main Main.idr) where Main.idr is located in a folder with spaces, the generated Chez program will fail to run. Instead it shows an error message like:

build/exec/_tmpchez: line 4: /Users/username/Library/Mobile: No such file or directory

I added a test where idris2 is run inside a folder with spaces. (I named the test chez016 because chez015 is already taken by #284)

This issue was originally introduced in fd7a2e5.

[edwinb]

Thanks for the fix. Something funny has happened with the test numbering though - would you mind updating it, then I'll merge? Ta.

[chrrasmussen]

Interestingly, I could resolve the conflict directly from the GitHub page. It is now ready to be merged :)

[edwinb]

Splendid, thank you!