## Loading

The editor should be loaded with first paragraph indented by `1.5em`.

## Testing

- The indent button should indent list, block and heading.
- The outdent button should outdent list, block and heading.
- The indentation should be done in steps by `40px`.
- Indenting paragraph with `1.5em` should first set it to `40px`.
- Outdenting paragraph with `1.5em` should remove indent.
