How to validate a non required filed that should not contain the following special characters `#<`>` and a white space before dot(.) I have Regex `\`|\#|\&|\<|\ \.|\>` to validate above condition but don't have any idea how to this regex with the yup.matches(). Thanks in advance 

```
Regex: \`|\#|\&|\<|\ \.|\> 

```

my validation schema is:

```
const validationSchema = function (values) {
  var regx = new RegExp(/\`|\#|\&|\<|\ \.|\>/gms);
    return Yup.object().shape({
      about: Yup.string()
      .matches(expression, 'about should not contain ` # < > \n')

    })
  }

```