resolve #126

Parsedown.php

@@ -1298,7 +1298,7 @@ class Parsedown
             return;
         }
 
-        if (preg_match('/^\([ ]*([^ ]+?)(?:[ ]+(".+?"|\'.+?\'))?[ ]*\)/', $remainder, $matches))
+        if (preg_match('/^[(]((?:[^ (]|[(][^ )]+[)])+)(?:[ ]+("[^"]+"|\'[^\']+\'))?[)]/', $remainder, $matches))
         {
             $Element['attributes']['href'] = $matches[1];
 

test/data/inline_link.html

@@ -1,4 +1,4 @@
-<p><a href="http://example.com">link</a> and <a href="/tests/">another link</a></p>
+<p><a href="http://example.com">link</a> and <a href="/url-with-(parentheses)">another link</a></p>
 <p><a href="http://example.com"><code>link</code></a></p>
 <p><a href="http://example.com"><img src="http://parsedown.org/md.png" alt="MD Logo" /></a></p>
 <p><a href="http://example.com"><img src="http://parsedown.org/md.png" alt="MD Logo" /> and text</a></p>

test/data/inline_link.md

@@ -1,4 +1,4 @@
-[link](http://example.com) and [another link](/tests/)
+[link](http://example.com) and [another link](/url-with-(parentheses))
 
 [`link`](http://example.com)
 

test/data/inline_link_title.html

@@ -1 +1,4 @@
-<p><a href="http://example.com" title="Title">single quotes</a> and <a href="http://example.com" title="Title">double quotes</a></p>
+<p><a href="http://example.com" title="Title">single quotes</a></p>
+<p><a href="http://example.com" title="Title">double quotes</a></p>
+<p><a href="http://example.com" title="2 Words">space</a></p>
+<p><a href="http://example.com/url-(parentheses)" title="Title">parentheses</a></p>

test/data/inline_link_title.md

@@ -1 +1,7 @@
-[single quotes](http://example.com 'Title') and [double quotes](http://example.com "Title")
+[single quotes](http://example.com 'Title')
+
+[double quotes](http://example.com "Title")
+
+[space](http://example.com "2 Words")
+
+[parentheses](http://example.com/url-(parentheses) "Title")