Fixed indentation of Python examples in C comments.

diff --cc Python/compile.c
index 29b88ff0e3dccb0b9bfeb1e8e6253e7b6ad4221b,cbc23aa209dc6c9a3a2f5b06b4767e5a021cda8b..da16b833bfc26f036aca33fde2f8d74081f8b837
--- 1/Python/compile.c
--- 2/Python/compile.c
+++ b/Python/compile.c
@@@ -3630,9 -3630,9 +3630,9 @@@ expr_constant(struct compiler *c, expr_
         BLOCK
     finally:
         if an exception was raised:
--       exc = copy of (exception, instance, traceback)
++           exc = copy of (exception, instance, traceback)
         else:
--       exc = (None, None, None)
++           exc = (None, None, None)
         if not (await exit(*exc)):
             raise
   */