^p = carriage return
^l = a line break (that’s an L)
Using Find and Replace
Sometimes, however, you will not want to paste as unformatted text. In that case, what you will most likely get is text with a line break at the end of each line. Provided there is an empty line at the end of each paragraph, cleanup is still relatively simple. It takes just two Find and Replace operations.
Press Ctrl+H to open the Find and Replace dialog.
In the “Find what” box, type ^l^l (those are lowercase Ls, representing two line breaks).
In the “Replace with” box, type ^p (the code for a paragraph break).
Replace All. You will now have a paragraph break at the end of each true paragraph.
In the “Find what” box, type ^l.
In the “Replace with” box, type a space.