BUG Markdown : if an automatic URL have two underscores, the <em> work and the URL is incorrect

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@2546 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

markdown.php

@@ -87,6 +87,9 @@ class markdown
     $replace[] = "<a href='\\1'>\\1</a>";
     $search[] = "#&lt;(.+@.+)&gt;#U";
     $replace[] = "<a href='mailto:\\1'>\\1</a>";
+    // The links must not allow the <em> : redo the conversion
+    $search[] = "#(<a href='.*)<em>(.*)</em>(.*'>.*)<em>(.*)</em>(.*</a>)#";
+    $replace[] = "\\1_\\2_\\3_\\4_\\5";
     // TODO : Links by reference :
     // Voici un petit texte écrit par [Michel Fortin][mf].
     // [mf]: http://michelf.ca/ "Mon site web"