After repeatedly being frustrated by a situation where an extra blank line was inserted between every other line when copying data from a particular program to the clipboard, I decided to write my own workaround. “crel” (“Clipboard Remove Empty Lines”) is a simple command-line utility for Windows that removes any empty/blank lines from the text data currently on the clipboard (if there is any).
Now (after putting crel.exe in a folder on my PATH), when I copy text data to the clipboard where I know spurious empty lines are present, I can type Windows key, crel, Enter, and they’re gone.
If this is something that would be useful to you, you can get it here: crel.exe v1.0.0 (4k)
crel is also available from my Windows Utilities page.