Cleaned tests file to correct all pyflakes and pep8 errors

You've sort of made two list items out of one.

I recommend not:

```
    * put some mappings of forwarder addresses to dates and user objects in
    * the Forwarder table
```

but instead

```
    * put some mappings of forwarder addresses to dates and user objects in
      the Forwarder table
```

to indicate the same bullet's text continues