[testFile] remove unnecessary parentheses

Author: jgrewe

nixio/test/test_file.py

@@ -66,9 +66,9 @@ def test_file_blocks(self):
         with self.assertRaises(ValueError):
             self.file.create_block()
             self.file.create_block(name="a name")
-        
+
         b = self.file.create_block(type_="type_a")
-        assert(b.id == b.name)
+        assert b.id == b.name
 
     def test_file_sections(self):
         assert len(self.file.sections) == 0