Fix stringFormatter
Fix stringFormatter

Before:
```shell
test.css
 2:3  ✖  Expected single quotes around font-family name "冬青黑体简体中文"   font-family-name-quotes
   4
```
After:
```shell
test.css
 2:34  ✖  Expected single quotes around font-family name "冬青黑体简体中文"   font-family-name-quotes
```
hudochenkov/stylelint,gucong3000/stylelint,hudochenkov/stylelint,stylelint/stylelint,heatwaveo8/stylelint,gaidarenko/stylelint,heatwaveo8/stylelint,gaidarenko/stylelint,gucong3000/stylelint,stylelint/stylelint,gaidarenko/stylelint,gucong3000/stylelint,hudochenkov/stylelint,stylelint/stylelint,heatwaveo8/stylelint,stylelint/stylelint