* Returns a string copy of the input character sequence, with each matching BMP character
   * replaced by a given replacement sequence. For example:
   *
   * {@snippet :
   * CharMatcher.is('a').replaceFrom("yaha", "oo")
   * }
   *
   * ... returns {@code "yoohoo"}.
   *
   * <p><b>Note:</b> If the replacement is a fixed string with only one character, you are better

   * Returns a string copy of the input character sequence, with each matching BMP character
   * replaced by a given replacement sequence. For example:
   *
   * {@snippet :
   * CharMatcher.is('a').replaceFrom("yaha", "oo")
   * }
   *
   * ... returns {@code "yoohoo"}.
   *
   * <p><b>Note:</b> If the replacement is a fixed string with only one character, you are better

	{"", "a", -1},
	{"x", "a", -1},
	{"x", "x", 0},
	{"abc", "a", 0},
	{"abc", "b", 1},
	{"abc", "c", 2},
	{"abc", "x", -1},
	{"barfoobarfooyyyzzzyyyzzzyyyzzzyyyxxxzzzyyy", "x", 33},
	{"fofofofooofoboo", "oo", 7},
	{"fofofofofofoboo", "ob", 11},
	{"fofofofofofoboo", "boo", 12},
	{"fofofofofofoboo", "oboo", 11},
	{"fofofofofoooboo", "fooo", 8},
	{"fofofofofofoboo", "foboo", 10},
	{"fofofofofofoboo", "fofob", 8},