+(deftest str.12 (string-trim-last-character "") "")
+(deftest str.13 (string-trim-last-character "a") "")
+(deftest str.14 (string-trim-last-character "ab") "a")
+(deftest str.15 (nstring-trim-last-character "") "")
+(deftest str.16 (nstring-trim-last-character "a") "")
+(deftest str.17 (nstring-trim-last-character "ab") "a")