Encode array parameters as JSON

See https://www.woltlab.com/community/thread/311085-array-to-string-conversion/

Author: dtdesign

wcfsetup/install/files/acp/templates/__devtoolsMissingLanguageItemStackTrace.tpl

@@ -1,7 +1,9 @@
 <ol class="nativeList" start="0">
 	{foreach from=$stackTrace item=stackEntry}
+		{assign var=__args value=$stackEntry['args']}
+		{if $__args|is_array}{assign var=__args value=$__args|json}{/if}
 		<li>
-			<strong>{$stackEntry['class']}</strong>{$stackEntry['type']}{$stackEntry['function']}({@$stackEntry['args']})<br>
+			<strong>{$stackEntry['class']}</strong>{$stackEntry['type']}{$stackEntry['function']}({unsafe:$__args})<br>
 			<small>{$stackEntry[file]} ({$stackEntry[line]})</small>
 		</li>
 	{/foreach}