***1、TrimRight/Left：***
```
函数定义：
// TrimRight returns a slice of the string s, with all trailing
// Unicode code points contained in cutset removed.
//从右往左删除s中所有包含在cutset里面的字符；直到遇到不包含在cutset里面的字符为止
func TrimRight(s string, cutset string) string
// TrimLeft returns a slice of the string s with all leading
// Unicode code points contained in cutset removed.
//从左往右删除s中所有包含在cutset里面的字符；直到遇到不包含在cutset里面的字符为止
func TrimLeft(s string, cutset string) string
fmt.Println(strings.TrimRight("abcbab", "ab"))
输出：abc
fmt.Println(strings.TrimLeft("abcbab", "ab"))
输出：cbab
```
***2、TrimSuffix/Pefix：***
函数定义：
// TrimSuffix returns s without the provided trailing suffix string.
// If s doesn't end with suffix, s is returned unchanged.
// 删除后缀
func TrimSuffix(s, suffix []byte) []byte
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