lib.sh: use xprintf in x_

don't echo the arguments

this new logic shows quotes, in error outputs.

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/lib.sh

@@ -149,8 +149,8 @@ dx_()
 
 x_()
 {
-	[ $# -lt 1 ] || [ -n "$1" ] || err "Empty first arg: x_ $(echo "$@")"
-	[ $# -lt 1 ] || "$@" || err "Unhandled error for: $(echo "$@")"; :
+	[ $# -lt 1 ] || [ -n "$1" ] || err "Empty first arg: x_ $(xprintf "$@")"
+	[ $# -lt 1 ] || "$@" || err "Unhandled error for: $(xprintf "$@")"; :
 }
 
 xchk()
@@ -167,6 +167,7 @@ xprintf()
 	while [ $# -gt 0 ]; do
 		printf "\"%s\"" "$1"
 		xprintfargs=1
+		[ $# -gt 1 ] && printf " "; :
 		shift 1
 	done
 	[ $xprintfargs -gt 0 ] && printf "\n"; :