[VarDumper] Fix HTML of invisible characters

Author: fancyweb

Dumper/HtmlDumper.php

@@ -928,7 +928,7 @@ protected function style(string $style, string $value, array $attr = []): string
 
         if (!($attr['binary'] ?? false)) {
             $v = preg_replace_callback(static::$unicodeCharsRx, function ($c) {
-                return '<span class="sf-dump-default>\u{'.strtoupper(dechex(mb_ord($c[0]))).'}</span>';
+                return '<span class="sf-dump-default">\u{'.strtoupper(dechex(mb_ord($c[0]))).'}</span>';
             }, $v);
         }
 

Tests/Dumper/HtmlDumperTest.php

@@ -69,7 +69,7 @@ public function testGet()
     <span class=sf-dump-str title="11 binary or non-UTF-8 characters">&#233;<span class="sf-dump-default">\\x01</span>test<span class="sf-dump-default">\\t</span><span class="sf-dump-default sf-dump-ns">\\n</span></span>
     <span class=sf-dump-str title="11 binary or non-UTF-8 characters">ing</span>
     """
-  "<span class=sf-dump-key>bo<span class="sf-dump-default>\\u{FEFF}</span>m</span>" => "<span class=sf-dump-str title="5 characters">te<span class="sf-dump-default>\\u{FEFF}</span>st</span>"
+  "<span class=sf-dump-key>bo<span class="sf-dump-default">\\u{FEFF}</span>m</span>" => "<span class=sf-dump-str title="5 characters">te<span class="sf-dump-default">\\u{FEFF}</span>st</span>"
   "<span class=sf-dump-key>[]</span>" => []
   "<span class=sf-dump-key>res</span>" => <span class=sf-dump-note>stream resource</span> <a class=sf-dump-ref>@{$res}</a><samp data-depth=2 class=sf-dump-compact>
 %A  <span class=sf-dump-meta>wrapper_type</span>: "<span class=sf-dump-str title="9 characters">plainfile</span>"