There's no way that statement on its own would add a + sign.
I think you need to give us a bit more context in order to find the cause of the problem: a few more lines of your code; what your input looks like; what your output looks like; and what you expect your output to look like...
Then we'll be able to help you out, hopefully.
In reply to Re^3: regex to remove all non a-z and spaces
by muntfish
in thread regex to remove all non a-z and spaces
by coldfingertips
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