Words with -(minus) highlight to bugs

Someting wrong with inserting a minus character.
It will not cure even if it esacepes.

```
words: [{
            color: '#ADF0FF',
            words: '-'
          },{
            color: '#ADF000',
            words: '\-'
          },{
            color: '#ADFF00',
            words: 'test'
          }]
```