hide-threads.js: a bigger minus character

js/hide-threads.js

@@ -44,7 +44,7 @@ $(document).ready(function(){
 	$('div.post.op').each(function() {
 		var id = $(this).children('p.intro').children('a.post_no:eq(1)').text();
 		var thread_container = $(this).parent();
-		$('<a class="hide-thread-link" style="float:left;margin-right:5px" href="javascript:void(0)">[-]</a><span> </span>')
+		$('<a class="hide-thread-link" style="float:left;margin-right:5px" href="javascript:void(0)">[–]</a><span> </span>')
 			.insertBefore(thread_container.find('p.fileinfo:first'))
 			.click(function() {
 				hidden_data[board][id] = Math.round(Date.now() / 1000);