Update JavaScript style guide to 2.28:

- Fix typo.

Update Python style guide to 2.29:
 - Fix indirect setter.

javascriptguide.xml

@@ -3,7 +3,7 @@
 <GUIDE title="Google JavaScript Style Guide">
   <p class="revision">
     
-    Revision 2.27
+    Revision 2.28
   </p>
   
   <address>
@@ -345,7 +345,7 @@
         <p><code>eval()</code> makes for confusing semantics and is dangerous
           to use if the string being <code>eval()</code>'d contains user input.
           There's usually a better, more clear, safer way to write your code, so
-          its used is generally not permitted. However <code>eval</code> makes
+          its use is generally not permitted. However <code>eval</code> makes
           deserialization considerably easier than the non-<code>eval</code>
           alternatives, so its use is acceptable for this task (for example, to
           evaluate RPC responses).</p>
@@ -3194,7 +3194,7 @@
   </PARTING_WORDS>
 
   <p align="right">
-    Revision 2.27
+    Revision 2.28
   </p>
 
   

pyguide.html

@@ -136,7 +136,7 @@
 <H1>Google Python Style Guide</H1>
   <p align="right">
 
-    Revision 2.28
+    Revision 2.29
   </p>
   
   <address>
@@ -842,7 +842,7 @@ from sound.effects import echo
 
        <span class="external">  </span>def ___set_area(self, area):
          <span class="external">    </span>"""Indirect setter for 'area' property."""
-         <span class="external">    </span>self._SetArea(area)
+         <span class="external">    </span>self.__set_area(area)
 
        <span class="external">  </span>area = property(___get_area, ___set_area,
        <span class="external">  </span>                doc="""Gets or sets the area of the square.""")
@@ -2112,7 +2112,7 @@ Don'<span class="external"></span>t do this.
 
 
 <p align="right">
-Revision 2.28
+Revision 2.29
 </p>