fix #57 : typo in BC comment

Author: labarba

lessons/14_Step_11.ipynb

@@ -304,10 +304,10 @@
     "                          dx**2 * dy**2 / (2 * (dx**2 + dy**2)) * \n",
     "                          b[1:-1,1:-1])\n",
     "\n",
-    "        p[:, -1] = p[:, -2] ##dp/dy = 0 at x = 2\n",
-    "        p[0, :] = p[1, :]  ##dp/dy = 0 at y = 0\n",
-    "        p[:, 0] = p[:, 1]    ##dp/dx = 0 at x = 0\n",
-    "        p[-1, :] = 0        ##p = 0 at y = 2\n",
+    "        p[:, -1] = p[:, -2] # dp/dx = 0 at x = 2\n",
+    "        p[0, :] = p[1, :]   # dp/dy = 0 at y = 0\n",
+    "        p[:, 0] = p[:, 1]   # dp/dx = 0 at x = 0\n",
+    "        p[-1, :] = 0        # p = 0 at y = 2\n",
     "        \n",
     "    return p"
    ]
@@ -359,13 +359,13 @@
     "                        dt / dy**2 *\n",
     "                       (vn[2:, 1:-1] - 2 * vn[1:-1, 1:-1] + vn[0:-2, 1:-1])))\n",
     "\n",
-    "        u[0, :] = 0\n",
-    "        u[:, 0] = 0\n",
+    "        u[0, :]  = 0\n",
+    "        u[:, 0]  = 0\n",
     "        u[:, -1] = 0\n",
-    "        u[-1, :] = 1    #set velocity on cavity lid equal to 1\n",
-    "        v[0, :] = 0\n",
-    "        v[-1, :]=0\n",
-    "        v[:, 0] = 0\n",
+    "        u[-1, :] = 1    # set velocity on cavity lid equal to 1\n",
+    "        v[0, :]  = 0\n",
+    "        v[-1, :] = 0\n",
+    "        v[:, 0]  = 0\n",
     "        v[:, -1] = 0\n",
     "        \n",
     "        \n",
@@ -660,7 +660,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.1"
+   "version": "3.6.5"
   }
  },
  "nbformat": 4,