[FIX] skip parsing argvariables when converting between tiki and markdown syntax

lib/parser/parserlib.php

@@ -81,6 +81,7 @@ class ParserLib extends TikiDb_Bridge
                 'noparseplugins' => false,
                 'stripplugins' => false,
                 'noheaderinc' => false,
+                'noparseargvariables' => false,
                 'page' => $page,
                 'print' => false,
                 'parseimgonly' => false,
@@ -1798,6 +1799,10 @@ class ParserLib extends TikiDb_Bridge
         $tikilib = TikiLib::lib('tiki');
         $smarty = TikiLib::lib('smarty');
 
+        if (! empty($this->option['noparseargvariables'])) {
+            return;
+        }
+
         if ($prefs['feature_wiki_argvariable'] == 'y' && ! $this->option['wysiwyg']) {
             if (preg_match_all("/\\{\\{((\w+)(\\|([^\\}]*))?)\\}\\}/", $data, $args, PREG_SET_ORDER)) {
                 $needles = [];

lib/wiki/editlib.php

@@ -1525,7 +1525,7 @@ class EditLib
         $syntaxPluginResult = $wikiParserParsable->guess_syntax($data);
         $source_syntax = $syntaxPluginResult['syntax'];
         $wikiParserParsable->stripPlugins('code');
-        $html = $wikiParserParsable->parse(['noparseplugins' => true]);
+        $html = $wikiParserParsable->parse(['noparseplugins' => true, 'noparseargvariables' => true]);
 
         $prefs['wiki_heading_links'] = $old_pref;