diff --git a/rnsutils/instrument.py b/rnsutils/instrument.py
index 6b7881b..98ca58b 100644
--- a/rnsutils/instrument.py
+++ b/rnsutils/instrument.py
@@ -21,13 +21,20 @@ def db_to_renoise_volume(volume):
 
 
 def _elements_equal(e1, e2):
-    if e1 is None and e2 is None: return True
-    if e1 is None or e2 is None: return False
-    if e1.tag != e2.tag: return False
-    if e1.text != e2.text: return False
-    if e1.tail != e2.tail: return False
-    if e1.attrib != e2.attrib: return False
-    if len(e1) != len(e2): return False
+    if e1 is None and e2 is None:
+        return True
+    if e1 is None or e2 is None:
+        return False
+    if e1.tag != e2.tag:
+        return False
+    if e1.text != e2.text:
+        return False
+    if e1.tail != e2.tail:
+        return False
+    if e1.attrib != e2.attrib:
+        return False
+    if len(e1) != len(e2):
+        return False
     return all(_elements_equal(c1, c2) for c1, c2 in zip(e1.iterchildren(), e2.iterchildren()))
 
 
@@ -184,6 +191,7 @@ class RenoiseInstrument(object):
 
     @comment.setter
     def comment(self, value):
+        # noinspection PyPep8Naming
         E = objectify.E
 
         if 'Comments' not in self.root.GlobalProperties.getchildren():
@@ -204,6 +212,7 @@ class RenoiseInstrument(object):
 
     @tags.setter
     def tags(self, value):
+        # noinspection PyPep8Naming
         E = objectify.E
 
         if 'Tags' not in self.root.GlobalProperties.getchildren():