Correct minor typo

doc/kate/plugins.docbook

@@ -1509,7 +1509,7 @@ View.</para></listitem>
 <varlistentry>
 <term><guilabel>Show Toolbar</guilabel></term>
 <listitem><para>When Tree View and this option are enabled, a toolbar with
-actions like <guibutton>Save</guibutton> are displayed above the 
+actions like <guibutton>Save</guibutton> is displayed above the 
 list of documents. Uncheck this option if the toolbar should be
 hidden.</para></listitem>
 </varlistentry>