bug fix and added mathjax_ignore to tests

Author: Maru5er

pandas/io/formats/html.py

@@ -241,6 +241,7 @@ def _write_table(self, indent: int = 0) -> None:
         use_mathjax = get_option("display.html.use_mathjax")
         if not use_mathjax:
             _classes.append("tex2jax_ignore")
+            _classes.append("mathjax_ignore")
         if self.classes is not None:
             if isinstance(self.classes, str):
                 self.classes = self.classes.split()

pandas/tests/io/formats/style/test_style.py

@@ -487,10 +487,10 @@ def test_repr_html_ok(self, styler):
 
     def test_repr_html_mathjax(self, styler):
         # gh-19824 / 41395
-        assert "tex2jax_ignore" not in styler._repr_html_()
+        assert "tex2jax_ignore" and "mathjax_ignore" not in styler._repr_html_()
 
         with option_context("styler.html.mathjax", False):
-            assert "tex2jax_ignore" in styler._repr_html_()
+            assert "tex2jax_ignore" and "mathjax_ignore" in styler._repr_html_()
 
     def test_update_ctx(self, styler):
         styler._update_ctx(DataFrame({"A": ["color: red", "color: blue"]}))

pandas/tests/io/formats/test_to_html.py

@@ -933,10 +933,10 @@ def test_repr_html(self, float_frame):
 
     def test_repr_html_mathjax(self):
         df = DataFrame([[1, 2], [3, 4]])
-        assert "tex2jax_ignore" not in df._repr_html_()
+        assert "tex2jax_ignore" and "mathjax_ignore" not in df._repr_html_()
 
         with option_context("display.html.use_mathjax", False):
-            assert "tex2jax_ignore" in df._repr_html_()
+            assert "tex2jax_ignore" and "mathjax_ignore" in df._repr_html_()
 
     def test_repr_html_wide(self):
         max_cols = 20