Added a space between a word and a tag.

Author: usamimikamen-sk

guide/C/ch_oview.xml

@@ -524,7 +524,7 @@
       <title>Context Help</title>
 
       <para>The context help provides detailed instructions for using &app;'s menus, windows, and controls. To
-        open online help, select<menuchoice>
+        open online help, select <menuchoice>
           <guimenu>Help</guimenu> <guimenuitem>Contents</guimenuitem>
         </menuchoice>.
       </para>