Python: Fix trailing whitespace in a single qhelp file

Since I edited already, why not get this little bonus? :D

Author: RasmusWL

python/ql/src/Classes/SlotsInOldStyleClass.qhelp

@@ -5,21 +5,21 @@
 
 <overview>
 <p>The ability to override the class dictionary using a <code>__slots__</code> declaration
-is supported only by new-style classes. When you add a <code>__slots__</code> declaration to an 
+is supported only by new-style classes. When you add a <code>__slots__</code> declaration to an
 old-style class it just creates a class attribute called <code>__slots__</code>.</p>
 
 </overview>
 <recommendation>
 
-<p>If you want to override the dictionary for a class, then ensure that the class is a new-style class. 
+<p>If you want to override the dictionary for a class, then ensure that the class is a new-style class.
 You can convert an old-style class to a new-style class by inheriting from <code>object</code>.</p>
 
 </recommendation>
 <example>
-<p>In the following example the <code>KeyedRef</code> class is an old-style class (no inheritance). The 
-dictionary is unaffected. The <code>KeyedRef2</code> class is a new-style class so the 
-<code>__slots__</code> declaration causes special compact attributes to be created for each name in 
+<p>In the following example the <code>KeyedRef</code> class is an old-style class (no inheritance). The
 <code>__slots__</code> declaration in this class creates a class attribute called <code>__slots__</code>, the class
+dictionary is unaffected. The <code>KeyedRef2</code> class is a new-style class so the
+<code>__slots__</code> declaration causes special compact attributes to be created for each name in
 the slots list and saves space by not creating attribute dictionaries.</p>
 
 <sample src="SlotsInOldStyleClass.py" />
@@ -28,7 +28,7 @@ the slots list and saves space by not creating attribute dictionaries.</p>
 <references>
 
 <li>Python Glossary: <a href="http://docs.python.org/glossary.html#term-new-style-class">New-style class</a>.</li>
-<li>Python Language Reference: <a href="http://docs.python.org/2/reference/datamodel.html#newstyle">New-style and classic 
+<li>Python Language Reference: <a href="http://docs.python.org/2/reference/datamodel.html#newstyle">New-style and classic
 classes</a>,
  <a href="http://docs.python.org/reference/datamodel.html#__slots__">__slots__</a>.</li>