TR updates, first round

Author: lpozo

python-doctest/broken_tests.txt

@@ -10,5 +10,7 @@ def load_tests(loader, tests, ignore):
     return tests
 
 
-if __name__ == "__main__":
+# Your unittest tests goes here...
+
+if __name__ == '__main__':
     unittest.main()

python-doctest/calculations/test_calculations.py

@@ -7,4 +7,4 @@ True
 Hello, ... Python!
 
 >>> print("\tHello, World!")
-	Hello, World!
+	Hello, World!