Fix handling of adjacent lists.

An ordered list followed by an unordered list shouldn't be combined,
even in non-smartLists mode.

Should fix #530.

lib/marked.js

@@ -355,9 +355,10 @@ Lexer.prototype.token = function(src, top) {
 
         // Determine whether the next list item belongs here.
         // Backpedal if it does not belong in this list.
-        if (this.options.smartLists && i !== l - 1) {
+        if (i !== l - 1) {
           b = block.bullet.exec(cap[i + 1])[0];
-          if (bull !== b && !(bull.length > 1 && b.length > 1)) {
+          if (bull.length > 1 ? b.length === 1
+            : (b.length > 1 || (this.options.smartLists && b !== bull))) {
             src = cap.slice(i + 1).join('\n') + src;
             i = l - 1;
           }

test/new/adjacent_lists.html

@@ -0,0 +1,9 @@
+<ul>
+<li>This should be</li>
+<li>An unordered list</li>
+</ul>
+
+<ol>
+<li>This should be</li>
+<li>An unordered list</li>
+</ol>

test/new/adjacent_lists.md

@@ -0,0 +1,5 @@
+* This should be
+* An unordered list
+
+1. This should be
+2. An unordered list