cppguide: remove space before comma

cppguide.html

@@ -4662,8 +4662,7 @@ one of the following remedies:</p>
   values self-describing.</li>
 
   <li>For functions that have several configuration options, consider
-  defining a single class or struct to hold all the options
-  ,
+  defining a single class or struct to hold all the options,
   and pass an instance of that.
   This approach has several advantages. Options are referenced by name
   at the call site, which clarifies their meaning. It also reduces
@@ -5894,4 +5893,4 @@ more interesting. Have fun!</p>
 <hr>
 </div>
 </body>
-</html>
+</html>