misc: Fix table formatting

Author: JDBetteridge

examples/seismic/tutorials/11_viscoacoustic.ipynb

@@ -68,27 +68,27 @@
    "source": [
     "<h1><center>Table of symbols</center></h1>\n",
     "\n",
-    "| Symbol &nbsp; &nbsp; &nbsp; &nbsp; | Description\n",
-    "| :---         | :---             \n",
-    "|$f$                                  |Frequency                                            |\n",
-    "|$f_o$                                |Reference frequency                                  |\n",
-    "|$\\omega$                             |Angular frenquency                                   |\n",
-    "|$\\omega_0$                           |Angular Reference Frequency                          |\n",
-    "|$v$                                  |Velocity model                                       |\n",
-    "|$v_0$                                |Reference velocity at $\\omega_0$                     |\n",
-    "|$\\kappa$                             |Bulk modulus                                         |\n",
-    "|$g$                                  |Absorption coefficient                               |\n",
-    "|$\\tau$                               |Relaxation time                                      |\n",
-    "|$\\tau_\\sigma$                        |Stress relaxation parameter                          |\n",
-    "|$\\tau_\\epsilon$                      |Strain relaxation parameter                          |\n",
-    "|$Q$                                  |Quality factor                                       |\n",
-    "|$\\eta$                               |Viscosity                                            |\n",
-    "|$\\rho$                               |Density                                              |\n",
-    "|$\\nabla$                             |Nabla operator                                       |\n",
-    "|$P({\\bf x},t)$                       |Pressure field                                       |\n",
-    "|$r({\\bf x},t)$                       |Memory variable                                      |\n",
-    "|${\\bf v}({\\bf x},t)$                 |Particle velocity                                    |\n",
-    "|$S({\\bf x}_s,t)$                     |Source                                               |"
+    "| Symbol &nbsp; &nbsp; &nbsp; &nbsp;  | Description                       |\n",
+    "| :---                                | :---                              |\n",
+    "|$f$                                  |Frequency                          |\n",
+    "|$f_o$                                |Reference frequency                |\n",
+    "|$\\omega$                             |Angular frenquency                 |\n",
+    "|$\\omega_0$                           |Angular Reference Frequency        |\n",
+    "|$v$                                  |Velocity model                     |\n",
+    "|$v_0$                                |Reference velocity at $\\omega_0$   |\n",
+    "|$\\kappa$                             |Bulk modulus                       |\n",
+    "|$g$                                  |Absorption coefficient             |\n",
+    "|$\\tau$                               |Relaxation time                    |\n",
+    "|$\\tau_\\sigma$                        |Stress relaxation parameter        |\n",
+    "|$\\tau_\\epsilon$                      |Strain relaxation parameter        |\n",
+    "|$Q$                                  |Quality factor                     |\n",
+    "|$\\eta$                               |Viscosity                          |\n",
+    "|$\\rho$                               |Density                            |\n",
+    "|$\\nabla$                             |Nabla operator                     |\n",
+    "|$P({\\bf x},t)$                       |Pressure field                     |\n",
+    "|$r({\\bf x},t)$                       |Memory variable                    |\n",
+    "|${\\bf v}({\\bf x},t)$                 |Particle velocity                  |\n",
+    "|$S({\\bf x}_s,t)$                     |Source                             |"
    ]
   },
   {