Just a wild guess...  Maybe there really is no mysterious character in between 6 and 1, and it's just some ultra-clever emacs mode (inadvertendly activated) that's trying to alert you that there should be something other than a space in between 6 and 1 (maybe it's expecting an operator, or some such?)...  What happens when you delete the weird character and enter a new space (instead of an underscore)?

In reply to Re: Weird underscore/whitespace failing regex by almut
in thread Weird underscore/whitespace failing regex by d-napizzle

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