Description of the new feature/enhancement

When pasting in the Terminal a command line that ends with a line break, my options are either to paste and run the command, or abort the operation. Most of the times, I actually want to paste while trimming the trailing line break, such that I can edit the command I am pasting.

Proposed technical implementation details (optional)

When pasting, a new button would appear in the confirmation dialog, that would allow to paste while trimming line breaks (if the string contains line breaks that are not trimmed, replace them by a space?)