add an extension to handle Chinese (or CJK) newlines.

[choueric]

There is a common discussion, for example here, about the difference between English and Chinese when there are linebreaks in a paragraph. Here is a method by adding a extension to join lines.

[rtfb]

Sorry for the delay to get back to you.

First, please rewrite the test to not need the testdata file. I see no reason for that. Also, move the test to block_test.go.

Also, how does this work with consecutive newline characters (and how should it)? I see from the test that it doesn't join all the input into a single line, but can't immediately see why.

[choueric]

Thanks for your suggestion and I did the modifications.

About the newline, there are actually two paragraphes in the testdata, one is:

第一
行文字。

and the other is:

第
二
行文字。

So it should generate two lines:

<p>第一行文字。</p>

and

<p>第二行文字。</p>

Consecutive newline characters, for example two newlines, are used to separate two paragraphes and should not generate just one line (i.e. one paragraph).

If I don't get your idea, please forgive me. Or you can give me an example to illustrate.

[rtfb]

Thanks, @choueric!