Fixed deletion of section title

Tutorial-Derivation_of_GRMHD_Evolution_Equations.ipynb

@@ -69,7 +69,8 @@
    "source": [
     "<a id='EM_tensor'></a>\n",
     "\n",
-    "C$$\\label{EM_tensor}$$\n",
+    "# Step 1: Deriving $T_{EM}^{\\mu\\nu}$ \\[Back to [top](#toc)\\]\n",
+    "$$\\label{EM_tensor}$$\n",
     "\n",
     "In order to find evolution equations for the conserved quantities for the system, we start by finding a convenient form of the electromagnetic energy-momentum tensor $T_{EM}^{\\mu\\nu}$, which is defined as\n",
     "\n",