[VarDumper] Fix CSS alignment in HtmlDumper

Author: alexandre-daubois

Dumper/HtmlDumper.php

@@ -663,7 +663,7 @@ function showCurrent(state)
    clear: both;
 }
 pre.sf-dump span {
-    display: inline;
+    display: inline-flex;
 }
 pre.sf-dump a {
     text-decoration: none;