_getOutput(match) {
    var instances = match.instances;
    var output = '\n' + '-'.repeat(60) + '\n\n' +
      chalk.bold(`Match - ${instances.length} instances\n`);

    instances.forEach((instance) => {
      var location = this._getFormattedLocation(instance);
      var lines = this._getLines(instance);
      output += `\n${location}\n${chalk.grey(lines)}\n`;
    });

    return output;
  }
Returns the string output to print for the given reporter. The string
contains the number of instances associated with the match and the files
and lines involved.

@private

@param   {Match}  match The inspector match to output
@returns {string} The formatted output