Re-work the GDB pretty-printing support to make it simpler to implement pretty-printing for commonly used data structure types and for pointers to them.
Re-work the GDB pretty-printing support to make it simpler to implement
pretty-printing for commonly used data structure types and for pointers to
them.

* tools/dev/gdb-py/svndbg/printers.py
  (TypedefRegexCollectionPrettyPrinter): Re-work to try looking up not only
    the given type, but also the type with one or more layers of 'typedef'
    stripped and/or a pointer dereferenced.
  (AprHashPrinter, AprArrayPrinter, SvnStringPrinter, SvnMergeRangePrinter,
   SvnRangelistPrinter): Assume that the value is not a pointer but that it
    may be 'None'.
  (libapr_printer2, libsvn_printer2): Remove.
  (build_libsvn_printers, register_libsvn_printers): Simplify accordingly.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1367262 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion