Coverage

Coverage report before improvements:

```
Statements   : 94.86% ( 1367/1441 )
Branches     : 91.65% ( 735/802 )
Functions    : 94.05% ( 158/168 )
Lines        : 95.11% ( 1303/1370 )
```

Coverage report after improvements:

```
Statements   : 95.89% ( 1377/1436 )
Branches     : 93.23% ( 744/798 )
Functions    : 94.71% ( 161/170 )
Lines        : 96.12% ( 1312/1365 )
```

We can continue to improve this quite considerably, and it will have a big impact on the reliability of jade.