Clarify and possibly improve syntax of the @param tag in the case of type parameters.

The examples below use three whitespace characters for clarity and defence against proportional fonts used by some browsers:

1. Is the whitespace before `<` mandatory? (@param<T> vs @param <T>)
2. Is the whitespace before `>` mandatory? (@param <T> vs @param <T >?

Perhaps this should mimic the Java Language. That is, all such whitespace characters should be optional; for example: List <T>, List<T>, List<T >, List< T>


Separately, the current wording only mentions "classes" in the context where it should be "classes and interfaces".