gdb

gdb
	* python/py-prettyprint.c (print_string_repr): Clear
	'addressprint' option when calling val_print_string.
	(print_children): Handle Val_pretty_default.  Clear 'addressprint'
	option when calling val_print_string.
gdb/testsuite
	* gdb.python/py-prettyprint.exp (run_lang_tests): Ensure no blank
	space before string output.  Add test for "set print pretty off"
	case.