This is very minor, but to help encourage best practises it'd be best to have the input type 'email' for this email input example instead of 'text'

- works when viewing page via file://
- sets a good example security-wise

...because we don't support it and it may cause problems for people
trying to view the docs in IE.

'input-block-level' was replaced with 'form-control' in v3. To get
block-level inputs, the 'form-control' class is now needed.