old_contents: 'use strict';
  
  var gulp = require('gulp');
  var config = require('../config').markup;
  var browserSync  = require('browser-sync');
  
  gulp.task('markup', function() {
    return gulp.src(config.src)
      .pipe(gulp.dest(config.dest))
      .pipe(browserSync.reload({stream:true}));
  });
  
new_contents: 'use strict';
  
  var gulp = require('gulp');
  var changed = require('gulp-changed');
  var config = require('../config').markup;
  var browserSync  = require('browser-sync');
  
  gulp.task('markup', function() {
    return gulp.src(config.src)
      .pipe(changed(config.dest))
      .pipe(gulp.dest(config.dest))
      .pipe(browserSync.reload({stream:true}));
  });
  
subject: include changed plugin in markup task to only move changed files