Fix some linting issues

openlp/core/common/__init__.py

@@ -232,6 +232,7 @@ def qmd5_hash(salt, data):
     log.debug('qmd5_hash() returning "%s"' % hash_value)
     return decode(hash_value.data(), 'ascii')
 
+
 def clean_button_text(button_text):
     """
     Clean the & and other characters out of button text
@@ -240,6 +241,7 @@ def clean_button_text(button_text):
     """
     return button_text.replace('&', '').replace('< ', '').replace(' >', '')
 
+
 from .openlpmixin import OpenLPMixin
 from .registry import Registry
 from .registrymixin import RegistryMixin

tests/functional/openlp_core_common/test_common.py

@@ -202,3 +202,4 @@ class TestCommonFunctions(TestCase):
 
         # THEN: The text should have been cleaned
         self.assertEqual(expected_text, actual_text, 'The text should be clean')
+