contrib/lightning-cli.bash-completion: fix for new simpler help format.

Plus, we don't need awk *and* sed for this!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

contrib/lightning-cli.bash-completion

@@ -31,7 +31,7 @@ _lightning_cli() {
 
             # get the regular commands
             if [[ -z "$cur" || "$cur" =~ ^[a-z] ]]; then
-		helpopts=$($lightning_cli help 2>/dev/null | awk '{print $4}' | sed 's@[,"]@@g')
+		helpopts=$($lightning_cli -H help 2>/dev/null | sed -n 's/^command=//p')
             fi
 
             COMPREPLY=( $( compgen -W "$helpopts $globalcmds" -X "*," -- "$cur" ) )