docs(test): fix jupyter equation numbering notebook

equation-numbering.ipynb

@@ -8,18 +8,39 @@
         "\n",
         "Inline math: $a^2 + b^2 = c^2$.\n",
         "\n",
-        "Manual equation tag:\n",
+        "Displayed equations below should be numbered automatically by the Gitea renderer.\n",
         "\n",
         "$$\n",
-        "\\\\int_0^1 x^2 \\\\, dx = \\\\frac{1}{3} \\\\tag{1}\n",
+        "\\int_0^1 x^2 \\, dx = \\frac{1}{3}\n",
         "$$\n",
         "\n",
-        "Second equation:\n",
-        "\n",
         "$$\n",
-        "f(x) = x^2 + 1 \\\\tag{2}\n",
+        "f(x) = x^2 + 1\n",
         "$$\n"
       ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": 1,
+      "metadata": {},
+      "outputs": [
+        {
+          "name": "stdout",
+          "output_type": "stream",
+          "text": [
+            "integral x^2 on [0, 1] = 0.333333\\n",
+            "sample values: [1.0, 1.0625, 1.25, 1.5625, 2.0]\\n"
+          ]
+        }
+      ],
+      "source": [
+        "def integral_x2(a=0.0, b=1.0):\\n",
+        "    return (b ** 3 - a ** 3) / 3.0\\n",
+        "\\n",
+        "values = [x * x + 1 for x in [0.0, 0.25, 0.5, 0.75, 1.0]]\\n",
+        "print(f'integral x^2 on [0, 1] = {integral_x2():.6f}')\\n",
+        "print(f'sample values: {values}')\\n"
+      ]
     }
   ],
   "metadata": {