code: function () {
      return gulp.src(paths.js_lint)
        .pipe(excludeGitignore())
        .pipe(eslint({
          rules: {
            // control characters eg `\n` are required for file appends
            'no-control-regex': 'off',
            // allow double quotes to avoid escaping single
            'quotes': ['error', 'single', {avoidEscape: true}],
            // relax curly
            'curly': ['error', 'multi-line']
          }
        }))
        .pipe(eslint.format())
        .pipe(eslint.failAfterError())
        .on('error', handleError('LINT'));
    }
docs: /*
  linting