manage merge conflict and ensure black edges

Author: mmcky

lectures/_static/lecture_specific/markov_chains_II/example4

@@ -2,6 +2,6 @@ digraph {
 	rankdir=LR
 	0
 	1
-	0 -> 1 [label=1.0 color=red]
-	1 -> 0 [label=1.0 color=red]
+	0 -> 1 [label=1.0]
+	1 -> 0 [label=1.0]
 }

lectures/_static/lecture_specific/markov_chains_II/example4.png

@@ -18,7 +18,11 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Requirement already satisfied: graphviz in /Users/mmcky/anaconda3/envs/quantecon/lib/python3.11/site-packages (0.20.3)\n"
+      "Collecting graphviz\n",
+      "  Using cached graphviz-0.20.3-py3-none-any.whl.metadata (12 kB)\n",
+      "Using cached graphviz-0.20.3-py3-none-any.whl (47 kB)\n",
+      "Installing collected packages: graphviz\n",
+      "Successfully installed graphviz-0.20.3\n"
      ]
     }
    ],
@@ -147,8 +151,8 @@
     "dot.node(\"0\")\n",
     "dot.node(\"1\")\n",
     "\n",
-    "dot.edge(\"0\", \"1\", label=\"1.0\", color='red')\n",
-    "dot.edge(\"1\", \"0\", label=\"1.0\", color='red')\n",
+    "dot.edge(\"0\", \"1\", label=\"1.0\")\n",
+    "dot.edge(\"1\", \"0\", label=\"1.0\")\n",
     "\n",
     "dot\n",
     "dot.render(filename='example4')"