old_contents: /*global module:false*/
  module.exports = function(grunt) {
  
    // Project configuration.
    grunt.initConfig({
      // Task configuration.
      jshint: {
        options: {
          curly: true,
          eqeqeq: true,
          latedef: 'nofunc', // Allow function definitions after their use.
          noarg: true,
          undef: true,
          unused: 'vars',
          // Deprecated relaxers
          sub: true,
          multistr: true,
          reporterOutput: ""
        },
        gruntfile: {
          src: 'Gruntfile.js'
        },
        frontend: {
          options: {
            browser: true,
            globals: {
              define: false,
              App: false
            }
          },
          src: ['public/**/*.js', '!public/js/debug.js', 'views/**/*.js']
        },
        backend: {
          options: {
            node: true
          },
          src: ['**/*.js', '!public/**/*.js', '!views/**/*.js', '!bower_components/**', '!node_modules/**']
        }
      },
      less: {
        options: {
          strictMath: true,
          outputSourceFiles: true
        },
        files: {
           src: [
              'views/current/less/*.less',
              'views/current/less/themes/*.less'
           ],
           expand: true,
           rename: function(dest, src) {
              return src.replace(/less/g, 'css');
           }
        }
        // END derived lines
      },
  
      watch: {
        less: {
          options: {
            spawn: false
          },
          files: ['views/**/*.less', 'less/*.less', 'public/**/*.less'],
          tasks: 'less'
        }
      },
    });
  
    // These plugins provide necessary tasks.
    grunt.loadNpmTasks('grunt-contrib-less');
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-watch');
  
    // Default task.
    grunt.registerTask('default', ['jshint:backend', 'less']);
  };
  
new_contents: /*global module:false*/
  module.exports = function(grunt) {
  
    // Project configuration.
    grunt.initConfig({
      // Task configuration.
      jshint: {
        options: {
          esversion: 6,
          curly: true,
          eqeqeq: true,
          latedef: 'nofunc', // Allow function definitions after their use.
          noarg: true,
          undef: true,
          unused: 'vars',
          // Deprecated relaxers
          sub: true,
          multistr: true,
          reporterOutput: ""
        },
        gruntfile: {
          src: 'Gruntfile.js'
        },
        frontend: {
          options: {
            browser: true,
            globals: {
              define: false,
              App: false
            }
          },
          src: ['public/**/*.js', '!public/js/debug.js', 'views/**/*.js']
        },
        backend: {
          options: {
            node: true
          },
          src: ['**/*.js', '!public/**/*.js', '!views/**/*.js', '!bower_components/**', '!node_modules/**']
        }
      },
      less: {
        options: {
          strictMath: true,
          outputSourceFiles: true
        },
        files: {
           src: [
              'views/current/less/*.less',
              'views/current/less/themes/*.less'
           ],
           expand: true,
           rename: function(dest, src) {
              return src.replace(/less/g, 'css');
           }
        }
        // END derived lines
      },
  
      watch: {
        less: {
          options: {
            spawn: false
          },
          files: ['views/**/*.less', 'less/*.less', 'public/**/*.less'],
          tasks: 'less'
        }
      },
    });
  
    // These plugins provide necessary tasks.
    grunt.loadNpmTasks('grunt-contrib-less');
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-watch');
  
    // Default task.
    grunt.registerTask('default', ['jshint:backend', 'less']);
  };
  
subject: Add es6 option to grunt/jshint