Fix inconsistency

tooltip vs. placeholder

_embed/templates/listing.tmpl

@@ -41,7 +41,7 @@
 <input id="newdir" type="text" placeholder="Name. End with a trailing slash to create a dir.">
 <div class="floating">
     <div class="action" id="new">
-        <i class="material-icons" title="New file or directory. If you don't write an extension, a directory will be created.">add</i>
+        <i class="material-icons" title="New file or directory. End name with a trailing slash to create a directory.">add</i>
     </div>
 </div>
 {{ end }}