old_contents: module.exports = function(grunt) {
  
      require('wf-js-grunt').init(grunt, {
          options: {
              requireConfig: {
                  paths: {
                      modernizr: 'bower_components/modernizr/modernizr',
                      'wf-js-common': './src',
                      'test': './test'
                  },
                  shim: {
                      modernizr: {
                          exports: 'Modernizr'
                      }
                  }
              },
              wwwPort: 9200,
              coverageThresholds: {
                  statements: 85,
                  branches: 75,
                  functions: 80,
                  lines: 85
              },
          }
      });
  };
  
new_contents: module.exports = function(grunt) {
  
      require('wf-grunt').init(grunt, {
          options: {
              requireConfig: {
                  paths: {
                      modernizr: 'bower_components/modernizr/modernizr',
                      'wf-js-common': './src',
                      'test': './test'
                  },
                  shim: {
                      modernizr: {
                          exports: 'Modernizr'
                      }
                  }
              },
              wwwPort: 9200,
              coverageThresholds: {
                  statements: 85,
                  branches: 75,
                  functions: 80,
                  lines: 85
              },
          }
      });
  };
  
subject: Rename to invalidate possible grunt caches