def find_source(gem, source)
      case source
      when Bundler::Source::Rubygems
        GemUpdater::RubyGemsFetcher.new(gem, source).source_uri
      when Bundler::Source::Git
        source.uri.gsub(/^git/, 'http').chomp('.git')
      end
    end
def find_source(gem, source)
      case source
      when Bundler::Source::Rubygems
        GemUpdater::RubyGemsFetcher.new(gem, source).source_uri
      when Bundler::Source::Git
        source.uri.gsub(/^git/, 'http').chomp('.git')
      end
    end
Find where is hosted the source of a gem

 @param gem [String] the name of the gem
 @param source [Bundler::Source] gem's source
 @return [String] url where gem is hosted