Avoid calling new.unlock() in __deepcopy__()

since the new object's properties aren't necessarily deepcopied yet...

masque/label.py

@@ -71,7 +71,8 @@ class Label(PositionableImpl, LayerableImpl, LockableImpl, RepeatableImpl, Annot
 
     def __deepcopy__(self: L, memo: Dict = None) -> L:
         memo = {} if memo is None else memo
-        new = copy.copy(self).unlock()
+        new = copy.copy(self)
+        LockableImpl.unlock(new)
         new._offset = self._offset.copy()
         new.set_locked(self.locked)
         return new

masque/repetition.py

@@ -116,7 +116,8 @@ class Grid(LockableImpl, Repetition, metaclass=AutoSlots):
 
     def __deepcopy__(self, memo: Dict = None) -> 'Grid':
         memo = {} if memo is None else memo
-        new = copy.copy(self).unlock()
+        new = copy.copy(self)
+        LocakbleImpl.unlock(new)
         new.locked = self.locked
         return new
 

masque/subpattern.py

@@ -101,7 +101,8 @@ class SubPattern(PositionableImpl, DoseableImpl, RotatableImpl, ScalableImpl, Mi
 
     def __deepcopy__(self, memo: Dict = None) -> 'SubPattern':
         memo = {} if memo is None else memo
-        new = copy.copy(self).unlock()
+        new = copy.copy(self)
+        LockableImpl.unlock(new)
         new.pattern = copy.deepcopy(self.pattern, memo)
         new.repetition = copy.deepcopy(self.repetition, memo)
         new.annotations = copy.deepcopy(self.annotations, memo)