Update notty and simple styles

styles/notty.json

@@ -67,7 +67,7 @@
   },
   "block_quote": {
     "indent": 1,
-    "indent_token": "> "
+    "indent_token": "│ "
   },
   "definition_list": {},
   "definition_term": {},

styles/simple.json

@@ -8,7 +8,6 @@
     "prefix": "# "
   },
   "h2": {
-    "block_prefix": "\n",
     "prefix": "## "
   },
   "h3": {