julycoding/The-Art-Of-Programming-by-July — pull request #34 by diseng (2013-12-20 15:58:16+00:00)
Title: 更新preface.md 修复昨日merge导入的错误

昨天在旧的preface.md上修改完就直接pull request了,忘记先update一下,导致又出现了英文符":",实在抱歉!