Add MD011 with tests, pass empty env to markdown-it.parse.

lib/rules.js

@@ -194,6 +194,24 @@ module.exports = [
     }
   },
 
+  {
+    "name": "MD011",
+    "desc": "Reversed link syntax",
+    "func": function MD011(params, errors) {
+      params.tokens.filter(function filterToken(token) {
+        return (token.type === "inline");
+      }).forEach(function forToken(token) {
+        token.children.filter(function filterChild(child) {
+          return (child.type === "text");
+        }).forEach(function forChild(child) {
+          if (child.content.match(/\([^)]+\)\[[^\]]+\]/)) {
+            errors.push(token.lineNumber);
+          }
+        });
+      });
+    }
+  },
+
   {
     "name": "MD031",
     "desc": "Fenced code blocks should be surrounded by blank lines",