fix an import ...

We were importing it from a module that was also importing it (but no
longer exists). Instead, we shoudl have been importing from the place it is defined.

Author: rocky

pymathics/natlang/linguistic_data.py

@@ -20,11 +20,12 @@
 from itertools import islice
 from typing import Optional
 
-from mathics.builtin.atomic.strings import anchor_pattern, to_regex
+from mathics.builtin.atomic.strings import anchor_pattern
 from mathics.builtin.numbers.randomnumbers import RandomEnv
 from mathics.core.atoms import String
 from mathics.core.builtin import MessageException
 from mathics.core.convert.expression import Expression, to_expression
+from mathics.core.convert.regex import to_regex
 from mathics.core.element import ElementsProperties
 from mathics.core.evaluation import Evaluation
 from mathics.core.list import ListExpression