def summary
      if @summary.nil?
        match = Command::SummaryMatcher.match documentation
        match.captures.first.strip if match
      else
        @summary
      end
    end
def summary
      if @summary.nil?
        match = Command::SummaryMatcher.match documentation
        match.captures.first.strip if match
      else
        @summary
      end
    end
Returns a short summary for this Command

 Typically generated by parsing #documentation for 'Summary: something',
 but it can also be set manually

 :api: public