Fix another typo

Author: juntyr

quaddtype/tests/test_quaddtype.py

@@ -504,7 +504,7 @@ def test_mod(a, b, backend, op):
     "0.9", "-0.9", "0.9999", "-0.9999",
     "1.1", "-1.1", "1.0001", "-1.0001",
     # Medium values
-    "10.0", "-10.0", "20.0x", "-20.0",
+    "10.0", "-10.0", "20.0", "-20.0",
     # Large values
     "100.0", "200.0", "700.0", "1000.0",
     "-100.0", "-200.0", "-700.0", "-1000.0",