old_contents: 'use strict';
  
  const gulp = require('gulp');
  const bs = require('browser-sync').create('server');
  
  gulp.task('server:reload', done => {
    bs.reload();
    done();
  });
  
  gulp.task('server', () => {
    bs.init({
      server: {
        baseDir: './dist',
      },
    })
  });
  
new_contents: 'use strict';
  
  const gulp = require('gulp');
  const bs = require('browser-sync').create('server');
  
  gulp.task('server:reload', done => {
    bs.reload();
    done();
  });
  
  gulp.task('server', done => {
    bs.init({
      server: {
        baseDir: './dist',
      },
    });
    done();
  });
  
subject: complete task with callback done