Repair late-night doc typos.

Lib/test/README

@@ -78,7 +78,7 @@ example:
         test_main(1)
 
 If run via regrtest, test_main() is called (by regrtest) without specifying
-verbose, and then test_supprot's idea of verbosity is used.  But when
+verbose, and then test_support's idea of verbosity is used.  But when
 run directly, test_main(1) is called, and then doctest's idea of verbosity
 is used.
 

Lib/test/test_support.py

@@ -183,8 +183,8 @@ def run_doctest(module, verbosity=None):
     """Run doctest on the given module.
 
     If optional argument verbosity is not specified (or is None), pass
-    test_support's belief about verbosity on to doctest.  Else doctest
-    sys.argv for -v.
+    test_support's belief about verbosity on to doctest.  Else doctest's
+    usual behavior is used (it searches sys.argv for -v).
     """
 
     import doctest