2006-01-16 Atsushi Enomoto <atsushi@ximian.com>

2006-01-16  Atsushi Enomoto <atsushi@ximian.com>

	* RelaxngValidatingReader.cs : just keep previous TextDeriv() result
	  for each pattern; they are mostly not reused. It makes validator
	  about 30% faster in certain validation and reduces memory use.

	* RdpPatterns.cs : RdpOneOrMore.EmptyTextDeriv() should be "override".
	  RdpList.EmptyTextDeriv() (which was also virtual incorrectly) was
	  removed since the code was in wrong assumption.
	* Util.cs : debug string now contains data and dataExcept info.

svn path=/trunk/mcs/; revision=55643