fixed: kinokopilka.tv tracker: URL can contain underscore sign (in hash)
refactoring: change whitespaces according to Ruby style guide

No tabs, indent 2 spaces.

See https://github.com/bbatsov/ruby-style-guide
remove unused parameter from `do_replace_torrent` function
improve: do not try to load v2 config for incorrect tracker description

Tracker description is a Ruby code only. Do not try to load v2 config if
description is incorrect.