Address PR review comments

* Update test case code for clarity
* Remove un-needed blank lines
* Update Windows azure pipeline to use python3.7.4

Addresses: #32

Signed-off-by: Steven Esser <[email protected]>

Author: steven-esser

azure-pipelines.yml

@@ -62,7 +62,7 @@ jobs:
                   python_version: '3.6'
                   python_architecture: 'x86'
               py37:
-                  python_version: '3.7.3'
+                  python_version: '3.7.4'
                   python_architecture: 'x86'
 
     - template: etc/ci/azure-win.yml

tests/test_license_expression.py

@@ -554,11 +554,13 @@ def test_parse_simplify_and_contain_and_equal(self):
 
     def test_parse_simplify_no_sort(self):
         licensing = Licensing()
+        expr = licensing.parse('gpl-2.0 OR apache-2.0')
+        expr2 = licensing.parse('apache-2.0 OR gpl-2.0')
 
-        expr = licensing.parse('gpl-2.0 OR apache-2.0 OR gpl-2.0')
-
-        self.assertEqual(expr.simplify(), expr.simplify(sort=False))
-        self.assertNotEqual(expr.simplify().pretty(), expr.simplify(sort=False).pretty())
+        self.assertEqual(expr, expr2)
+        self.assertEqual(expr.simplify(), expr2.simplify())
+        self.assertEqual(expr.simplify(sort=False), expr2.simplify())
+        self.assertNotEqual(expr.simplify(sort=False).pretty(), expr2.pretty())
 
     def test_license_expression_is_equivalent(self):
         lic = Licensing()