It seems like a sensible idea. It is a bit like the case sensitive option, and an 'Ignore whitespace' option could go on the editing form next to that.
It would also require a new column in the database, to store that setting.
Finally, you would need to change the test_response or compare_string_with_wildcard methods on the question type class to do the right thing if the new option is set. (And those methods have good unit tests, which would need to be updated to test the new code.)
Anyway, the procedure to follow for this sort of thing is http://docs.moodle.org/en/Development:Overview#Minor_Development. So, certainly create a tracker issue if there is not one already. Then try to find someone with time to do the work, because I won't have time in the near future.
Quiz
Blank Sapces
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