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There's a pretty general solution for disabling the non-breaking space in OS X for some apps:
How to disable the Option-Space key combination for non-breaking spaces?
Unfortunately, Xcode is not one of them, and the solution does not work.
Any ideas on how to disable Option-Space for Xcode specifically?
I'm using a slightly customized keyboard layout, created with Ukulele; perhaps it could be used to remap that particular combination?
I'd rather not use stuff like KeyRemap4Macbook (or whatever it's called), since I've experienced a considerable, unacceptable lag during typing when using that app with some remaps.
I've actually being using this solution for quite a while now - http://apple.stackexchange.com/a/179653/120468
– Sea Coast of Tibet – 2015-12-15T03:55:18.110