allow ONE level of matching parenthesis in links.

NON-COMPLIANT with commonmark!
adjust test #468 accordingly.

Author: Feder1co5oave

lib/marked.js

@@ -526,7 +526,7 @@ inline.tag = edit(inline.tag)
   .getRegex();
 
 inline._inside = /(?:\[[^\]]*\]|\\[\[\]]|[^\[\]]|\](?=[^\[]*\]))*/;
-inline._href = /\s*<?((?:\\[()]?|[^\s()\\])*?)>?(?:\s+['"]([\s\S]*?)['"])?\s*/;
+inline._href = /\s*<?((?:\\[()]?|\([^\s()\\]*\)|[^\s()\\])*?)>?(?:\s+['"]([\s\S]*?)['"])?\s*/;
 
 inline.link = edit(inline.link)
   .replace('inside', inline._inside)

test/new/cm_links.html

@@ -38,9 +38,11 @@ <h3 id="example-467">Example 467</h3>
 
 <p><a href="(foo)">link</a></p>
 
-<h3 id="example-468">Example 468</h3>
+<h3 id="example-4680">Example 4680</h3>
 
-<p><a href="foo(and(bar))">link</a></p>
+<p>ONE LEVEL of parentheses are allowed without escaping, as long as they are balanced:</p>
+
+<p><a href="foo(bar)">link</a></p>
 
 <h3 id="example-469">Example 469</h3>
 

test/new/cm_links.md

@@ -39,9 +39,11 @@ bar>)
 
 [link](\(foo\))
 
-### Example 468
+### Example 4680
 
-[link](foo(and(bar)))
+ONE LEVEL of parentheses are allowed without escaping, as long as they are balanced:
+
+[link](foo(bar))
 
 ### Example 469