Recent Commits to lark:master

Extend test case

type Terminal.__init__

fix sphinx config

Otherwise Sphinx complains:

```
WARNING: Invalid configuration value found: 'language = None'.
Update your configuration to a valid language code. Falling back to 'en' (English).
```

significant whitespace -> significant indentation

ignore strange file that appeared after running `make html`

fix markup now that i can see the html

add blurb on building docs

Use `isinstance(v, Token)`