# File lib/pry/command.rb, line 177
      def command_regex
        pr = Pry.respond_to?(:config) ? Pry.config.command_prefix : ""
        prefix = convert_to_regex(pr)
        prefix = "(?:#{prefix})?" unless options[:use_prefix]

        /^#{prefix}#{convert_to_regex(match)}(?!\S)/
      end