(deftest css.4 (concat-separated-strings "|" '("ab" "cd") nil) "ab|cd")
(deftest css.5 (concat-separated-strings "|" '("ab" "cd") nil '("ef")) "ab|cd|ef")
(deftest css.4 (concat-separated-strings "|" '("ab" "cd") nil) "ab|cd")
(deftest css.5 (concat-separated-strings "|" '("ab" "cd") nil '("ef")) "ab|cd|ef")
(deftest sse.4 (string-strip-ending "abc" '("ab")) "abc")
(deftest sse.5 (string-strip-ending "abcd" '("a" "cd")) "ab")
(deftest sse.4 (string-strip-ending "abc" '("ab")) "abc")
(deftest sse.5 (string-strip-ending "abcd" '("a" "cd")) "ab")