[Bug]: Deepcopy of TextPath fails #20943

from matplotlib.textpath import TextPath
TextPath((0, 0), ".").deepcopy()

AttributeError                            Traceback (most recent call last)
c:\figures.py in <module>
----> 1 TextPath((0, 0), ".").deepcopy()

~\.site-packages\matplotlib\path.py in __deepcopy__(self, memo)
    284         return self.__class__(
    285             self.vertices.copy(), codes,
--> 286             _interpolation_steps=self._interpolation_steps)
    287 
    288     deepcopy = __deepcopy__

~\.site-packages\matplotlib\textpath.py in __init__(self, xy, s, size, prop, _interpolation_steps, usetex)
    394 
    395         self._cached_vertices = None
--> 396         s, ismath = Text(usetex=usetex)._preprocess_math(s)
    397         self._vertices, self._codes = text_to_path.get_text_path(
    398             prop, s, ismath=ismath)

~\.site-packages\matplotlib\text.py in _preprocess_math(self, s)
   1186             return s, True
   1187         else:
-> 1188             return s.replace(r"\$", "$"), False
   1189 
   1190     def set_fontproperties(self, fp):

AttributeError: 'list' object has no attribute 'replace'