Add selftest for pretty-print.c
gcc/ChangeLog:
* pretty-print.c: Include "selftest.h".
(pp_format): Fix comment.
(identifier_to_locale): Likewise.
(selftest::test_basic_printing): New function.
(selftest::assert_pp_format): New function.
(selftest::test_pp_format): New function.
(selftest::pretty_print_c_tests): New function.
* selftest-run-tests.c (selftest::run_tests): Call
selftest::pretty_print_c_tests.
* selftest.h (pretty_print_c_tests): New declaration.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@237221 138bc75d-0d04-0410-961f-82ee72b054a4