Fix comments and unittest for market.py and style

Trying to make the right commit to  the develop branch.
@Renelvon,
> The new_peer.send is the statement, and its opening parenthesis is not the last character on the line.

I would say PEP8 isn't clear in this case, since ```proto_page``` could be considered the statement.  Also, that would force a 2 level indentation, since we would need to indent again after ```proto_page(``` anyway.