old_contents: 'use strict';
  var assert = require('assert');
  var isXCF = require('../index.js');
  var fs =require('fs');
  
  it('should reject a JPEG image from a buffer', function () {
    var jpegTestFile = fs.readFileSync('test/fixture.jpg');
    assert(!isXCF(jpegTestFile));
  });
  
  it('should detect an XCF image from a buffer', function () {
    var xcfTestFile = fs.readFileSync('test/fixture.xcf');
    assert(isXCF(xcfTestFile));
  });
  
new_contents: 'use strict';
  var assert = require('assert');
  var isXCF = require('../index.js');
  var fs = require('fs');
  
  it('should reject a JPEG image from a buffer', function () {
    var jpegTestFile = fs.readFileSync('test/fixture.jpg');
    assert(!isXCF(jpegTestFile));
  });
  
  it('should detect an XCF image from a buffer', function () {
    var xcfTestFile = fs.readFileSync('test/fixture.xcf');
    assert(isXCF(xcfTestFile));
  });
  
subject: correct weird spacing in test case