github.com/liujq9674git/golang-src-1.7@v0.0.0-20230517174348-17f6ec47f3f8/src/unicode (about) casetables.go digit.go digit_test.go example_test.go graphic.go graphic_test.go letter.go letter_test.go maketables.go script_test.go tables.go utf16 utf8