GDB pretty-printing: cosmetics.
GDB pretty-printing: cosmetics.

* tools/dev/gdb-py/svndbg/printers.py
  (children_of_apr_array): Fix a doc string error.
  (SvnStringPrinter, SvnMergeRangePrinter, SvnRangelistPrinter): When a value
    is to be displayed as 'NULL', don't format it as a string in quotes.
  (SvnPathrevPrinter): Handle a null value (that is, from a null pointer).
  (SvnRangelistPrinter, SvnMergeinfoPrinter, SvnMergeinfoCatalogPrinter):
    Consistify Python indentation.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion