Simplify logic for finding parent/ancestor note element

ppa/archive/eebo_tcp.py

@@ -56,17 +56,16 @@ def text_inside_note(self, text):
         if not self.notes:
             return None
 
-        within_note = None
         # check if this text is directly inside a note tag
+        within_note = None
+        # check if this is normal text directly inside a note tag
         parent = text.getparent()
-        if parent.tag == "NOTE" and not text.is_tail:
+        if parent.tag == "NOTE" and text.is_text:
             within_note = parent
-        # otherwise, check if text is nested under a note tag
+        # otherwise, check if text is nested somewhere under a note tag
         else:
-            for ancestor in parent.iterancestors():
-                if ancestor.tag == "NOTE":
-                    within_note = ancestor
-                    break
+            note_ancestors = parent.xpath("ancestor::NOTE[1]")
+            within_note = note_ancestors[0] if note_ancestors else None
 
         return within_note