Correct comments in the code

Author: ArasuCandassamy

chapter2/linear-elasticity-v2.ipynb

@@ -302,7 +302,7 @@
     "# assemble the Norm object\n",
     "l2_error_u = l2norm_uh.assemble(u=uh, kappa=kappa_val, mu=mu_val)\n",
     "\n",
-    "print(\"L2 error in velocity:\", l2_error_u)"
+    "print(\"L2 error in displacement:\", l2_error_u)"
    ]
   },
   {
@@ -404,7 +404,7 @@
     "error_u2 = u2 - exact_u2\n",
     "error_u3 = u3 - exact_u3\n",
     "\n",
-    "# Velocity plots\n",
+    "# Displacement plots\n",
     "z_plane_list = np.linspace(0, 1, 5)  #List of z-planes to plot\n",
     "fig = plt.figure(figsize=(24, 6 * len(z_plane_list)))\n",
     "\n",
@@ -549,11 +549,7 @@
    ]
   }
  ],
- "metadata": {
-  "language_info": {
-   "name": "python"
-  }
- },
+ "metadata": {},
  "nbformat": 4,
  "nbformat_minor": 5
 }