我想差异的输出转换（在降价文件） 降价与＆LT;罢工＆GT; 和＆LT; EM＆GT; 标签，这样我可以看到什么了 被移离或添加到文档的新版本。 （这种 治疗是法律文件很常见的。）

I'd like to convert the output of diff (on a Markdown file) to Markdown with <strike> and <em> tags, so that I can see what has been removed from or added to a new version of a document. (This kind of treatment is very common for legal documents.)

的希望的输出例：

为什么的我们学习编程语言的？的不是的的不的顺序到...

Why do weWe study programming languages? notNot in order to ...

其中的许多 困难的是，差异的输出是面向行的，在这里我想 看到个别字的差异。有没有人有建议， 要使用什么算法，或建立在什么软件？

One of the many difficulties is that diff's output is line-oriented, where I want to see differences in individual words. Does anyone have suggestions as to what algorithm to use, or what software to build on?

推荐答案

使用 wdiff 。它已经做了你要找的字的字比较;它的输出转换成降价应该只是一些简单的规律EX pressions。

Use wdiff. It already does the word-by-word comparison you're looking for; converting its output to markdown should take just a few simple regular expressions.

例如：

$ cat foo
Why do we study programming languages?  Not in order to
$ cat bar
We study programming languages not in order to
$ wdiff foo bar
[-Why do we-]{+We+} study programming [-languages?  Not-] {+languages not+} in order to
$ wdiff foo bar | sed 's|\[-|<em>|g;s|-]|</em>|g;s|{+|<strike>|g;s|+}|</strike>|g'
<em>Why do we</em><strike>We</strike> study programming <em>languages?  Not</em> <strike>languages not</strike> in order to

编辑：其实，wdiff有一些选项，使其更容易：

Actually, wdiff has some options that make it even easier:

$ wdiff -w '<em>' -x '</em>' -y '<strike>' -z '</strike>' foo bar
<em>Why do we</em><strike>We</strike> study programming <em>languages?  Not</em> <strike>languages not</strike> in order to