rc repl x11: do not send new line
rc repl x11: do not send new line

The X11 repl is unique in that it sends the selection (or parameter) with a
new line appended.

This patch removes that new line and thus, brings it into line with the tmux
and kitty versions.

lenormf/kakoune,Somasis/kakoune,danr/kakoune,Somasis/kakoune,jkonecny12/kakoune,danr/kakoune,danr/kakoune,mawww/kakoune,mawww/kakoune,jkonecny12/kakoune,lenormf/kakoune,mawww/kakoune,casimir/kakoune,casimir/kakoune,casimir/kakoune,alexherbo2/kakoune,alexherbo2/kakoune,alexherbo2/kakoune,lenormf/kakoune,jkonecny12/kakoune,lenormf/kakoune,Somasis/kakoune,danr/kakoune,mawww/kakoune,casimir/kakoune,Somasis/kakoune,jkonecny12/kakoune,alexherbo2/kakoune