Regarding the presence of double spaces in the source and target segments, there are these three variants:
>Take double (multiple) spaces completely out of QA for non-translatables. It's a real nuisance there.
Especially with source documents that were created from PDF files by the client and are delivered as Studio projects, these double or triple spaces can be a nuisance. Removing them from the source side is tricky, since they can span tags.