sent polyglot heredoc to ':' instead of 'cat > /dev/null'

forking to cat, just to write to /dev/null is wasteful

.tmux.conf

@@ -1,4 +1,4 @@
-# cat << EOF > /dev/null
+# : << EOF
 # https://github.com/gpakosz/.tmux
 # (‑●‑●)> dual licensed under the WTFPL v2 license and the MIT license,
 #         without any warranty.