Update protovalidate/internal/extra_func.py

Co-authored-by: Philip K. Warren <[email protected]>

Author: smaye81

protovalidate/internal/extra_func.py

@@ -788,7 +788,7 @@ def __hex_dig(self) -> bool:
 
         c = self._string[self._index]
 
-        if ("0" <= c <= "9") or ("a" <= c <= "f") or ("A" <= c <= "F") or ("0" <= c <= "9"):
+        if ("0" <= c <= "9") or ("a" <= c <= "f") or ("A" <= c <= "F"):
             self._index += 1
 
             return True