    # File lib/chef/knife/help.rb, line 74
          def find_manpages_for_query(query)
            possibilities = available_manpages_by_basename.keys.select do |manpage|
              ::File.fnmatch("knife-#{query}*", manpage) || ::File.fnmatch("#{query}*", manpage)
            end
            if possibilities.empty?
              ui.error "No help found for '#{query}'"
              ui.msg ""
              print_help_topics
              exit 1
            elsif possibilities.size == 1
              possibilities.first
            else
              ui.info "Multiple help topics match your query. Pick one:"
              ui.highline.choose(*possibilities)
            end
          end