typo in the tutorial

I'm now translating RELAX NG tutorial to Japanese (so that we can
attract more attention from the Japanese).

In this process, I found a typo in the tutorial. The last paragraph of
the section 9.3 is written as:

> then it could be customized to allow inline code and code elements as follows

But apparently it should be

> then it could be customized to allow inline code and em elements as follows


regards,
--
Kohsuke KAWAGUCHI                          +1 650 786 0721
Sun Microsystems