[property] Change export_leaf Comment and Newline

Author: fschrader1992

odml/property.py

@@ -666,7 +666,8 @@ def pprint(self, indent=2, max_length=80, current_depth=-1):
 
     def export_leaf(self):
         """
-        Export leaf, start at property.
+        Export only the path from this property to the root.
+        Include all properties of parent sections.
         """
         curr = self.parent
         par = self.parent
@@ -685,4 +686,4 @@ def export_leaf(self):
             child = par
             curr = curr.parent
 
-        return par
+        return par