rjeschke/txtmark — pull request #19 by fleaflicker (2013-11-19 20:48:02+00:00)
Title: Emiiter#checkEntity fails to recognize entities with digits (e.g., &frac14;)

For example, the following input

```this is a fraction ¼```

Will incorrectly generate this output, even though frac14 is one of the safe entities defined in HTML.java
```html

this is a fraction &frac14;

```