bpo-24746: Fix doctest failures when running the testsuite with -R (G…

…H-11501)

(cherry picked from commit c5dc60e)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

Lib/test/test_doctest.py

@@ -2450,8 +2450,7 @@ def test_unittest_reportflags():
     Then the default eporting options are ignored:
 
       >>> result = suite.run(unittest.TestResult())
-    """
-    """
+
     *NOTE*: These doctest are intentionally not placed in raw string to depict
     the trailing whitespace using `\x20` in the diff below.