Remove empty lines from code-block

In assert.rst at line 175 and further there is an example of an assert encountering comparisons. The code-block for this example starts with a comment (line 177)  and then it has 2 empty lines. Comparing this example code (test_assert2.py) with the previously mentioned example code on the same page (i.e. test_assert1.py) you can see that there should not be 2 empty lines after the comment. These 2 empty lines are removed.

doc/en/assert.rst

@@ -175,8 +175,6 @@ when it encounters comparisons.  For example:
 .. code-block:: python
 
     # content of test_assert2.py
-
-
     def test_set_comparison():
         set1 = set("1308")
         set2 = set("8035")