# File lib/pry/default_commands/gems.rb, line 64
        def process(pattern=nil)
          pattern = Regexp.compile(pattern || '')
          gems    = if Gem::Specification.respond_to?(:each)
                      Gem::Specification.select{|spec| spec.name =~ pattern }.group_by(&:name)
                    else
                      Gem.source_index.gems.values.group_by(&:name).select { |gemname, specs| gemname =~ pattern }
                    end

          gems.each do |gem, specs|
            specs.sort! do |a,b|
              Gem::Version.new(b.version) <=> Gem::Version.new(a.version)
            end

            versions = specs.each_with_index.map do |spec, index|
              index == 0 ? text.bright_green(spec.version.to_s) : text.green(spec.version.to_s)
            end

            output.puts "#{text.default gem} (#{versions.join ', '})"
          end
        end