[kotlin] remove trail slash

    fun removeTrailSlash(s: String): String {
        return s.replace(Regex("/$"), "")
    }

    fun String.removeTrailSlash(): String {
        return CommonUtil.removeTrailSlash(this)
    }

    @Test
    fun removeTrailSlash() {
        // given
        val expected = "asdf/qwer"
        val s = "$expected/"
        // when
        val actual = CommonUtil.removeTrailSlash(s)
        // then
        assertEquals(expected, actual)
    }
    
    @Test
    fun removeTrailSlash() {
        // given
        val expected = "asdf/qwer"
        val s = "$expected/"
        // when
        val actual = s.removeTrailSlash()
        // then
        Assertions.assertEquals(expected, actual)
    }

https://stackoverflow.com/questions/5437158/remove-a-trailing-slash-from-a-stringchanged-from-url-type-in-java/74485056#74485056

Remove a trailing slash from a string(changed from url type) in JAVA