Disable keyword expansion (adding hyperlinks) in <pre> blocks

[LearnCocos2D]

Example:

/** Usage: <pre> SomeClass* xx = [SomeClass categoryWithName:@"triggers"]; </pre> */

tries to insert a link to the known SomeClass class which makes the the code section pretty useless since most classes are known, and then the user sees invalid code like the following:

Usage:
[SomeClass](../Classes/SomeClass.html)*xx = [SomeClass categoryWithName:@"triggers"];

Note: this does not happen with <code> blocks but those don't have the nice formatting of <pre>
(<code> has no frame and no automatic line breaks).

[tomaz]

This is known issue with 2.x version. I planned to get it fixed with 3.0, but it's on hold for some time now...