After the first "correct" registration the next one works good.
Open a new one,
paste "Hello and Hello" (breaks it funny), then backspace until it is only "Hello" and now you can do the proper registration by typing " and Hello". Select all, then paste "Hello12 and He3llo3" it will break it right, now that it knows...
Impressive.
I think if you hold +1 history the levenshtein might work better? Way more complicated though. There must be something better than levenshtein.