sed: fix a command with multible trailing backslashes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

testsuite/sed.tests

@@ -258,4 +258,18 @@ testing "sed nested {}s" \
 	"qwe\nasd\nacd\nacd\n" "" \
 	"qwe\nasd\nzxc\n"
 
+testing "sed a cmd ended by double backslash" \
+	"sed -e '/| one /a \\
+	| three \\\\' -e '/| one-/a \\
+	| three-* \\\\'" \
+'	| one \\
+	| three \\
+	| two \\
+' '' \
+'	| one \\
+	| two \\
+'
+
+# testing "description" "arguments" "result" "infile" "stdin"
+
 exit $FAILCOUNT

testsuite/testing.sh

@@ -73,7 +73,7 @@ testing()
 
   if [ $# -ne 5 ]
   then
-    echo "Test $NAME has wrong number of arguments (must be 5) ($# $*)" >&2
+    echo "Test $NAME has wrong number of arguments: $# (must be 5)" >&2
     exit 1
   fi