Reply To: Pasting copy from a PDF into Idd

@Jesserenko Yes, GREP would certainly do what I want, especially if I can figure out how to keep double returns from being replaced so I won't lose the true paragraph return. 

Try this: (?<=[^\r]) *\r(?=[^\r]) — replace with a single space.

In its essence, it should search for at-left-not a return, any number of regular spaces (including none at all), a single return, at-right-not a return.

Since copy-and-paste often introduces some space before carriage returns, you need to allow for zero or more spaces before that return.