fix: apply suggestions from code review

Co-authored-by: Adam Turner <[email protected]>

Author: yihong0618

Lib/pydoc.py

@@ -2061,9 +2061,9 @@ def interact(self):
                 request = self.getline('help> ')
             except (KeyboardInterrupt, EOFError):
                 break
+            if not request or request.isspace():
+                continue  # back to the prompt
             request = request.strip()
-            if not request:
-                continue
 
             # Make sure significant trailing quoting marks of literals don't
             # get deleted while cleaning input

Lib/test/test_pydoc/test_pydoc.py

@@ -2179,7 +2179,7 @@ def mock_getline(prompt):
             with unittest.mock.patch.object(helper, "getline", mock_getline):
                 helper.interact()
 
-        return output.getvalue().replace(os.linesep, "\n")
+        return output.getvalue().split(os.linesep)
 
     def test_keywords(self):
         self.assertEqual(sorted(pydoc.Helper.keywords),