mathtext: Make pyparsing cache reset more explicit

QuLogic · QuLogic · commit 2bd74a6fe394 · 2023-08-30T16:29:16.000-04:00
Just as enabling the packrat cache occurs on the class overall, so does
the reset.
diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -2139,7 +2139,7 @@ def parse(self, s, fonts_object, fontsize, dpi):
         self._in_subscript_or_superscript = False
         # prevent operator spacing from leaking into a new expression
         self._em_width_cache = {}
-        self._expression.resetCache()
+        ParserElement.resetCache()
         return result[0]
 
     def get_state(self):
