Fixing Validation errors reported by https://validator.w3.org/#validate_by_input

Fixing Validation errors reported by https://validator.w3.org/#validate_by_input

Signed-off-by: Kalyan Prasad Tatavarthi <kalyan_prasad@in.ibm.com>
diff --git a/4.24/jdt.html b/4.24/jdt.html
index a8e800c..98eeebf 100644
--- a/4.24/jdt.html
+++ b/4.24/jdt.html
@@ -200,7 +200,7 @@
   </tr>
   -->
   <!-- *********************** End of JDT Developers ******************************** -->
-  <td colspan="2">
+  <tr><td colspan="2"/></tr>
 </tbody>
 </table>
 <!-- ****************** END OF N&N TABLE ****************** -->
diff --git a/4.24/pde.html b/4.24/pde.html
index a9db650..8290ccb 100644
--- a/4.24/pde.html
+++ b/4.24/pde.html
@@ -126,7 +126,8 @@
     <td id="pde-compiler" class="section" colspan="2"><h2>PDE Compiler</h2></td>
   </tr>
   -->
-   <!-- ******************** End of PDE Compiler ********************** --> 
+   <!-- ******************** End of PDE Compiler ********************** -->
+  <tr><td colspan="2"/></tr>  
 </tbody>
 </table>
 <!-- ****************** END OF N&N TABLE ****************** -->
diff --git a/4.24/platform.html b/4.24/platform.html
index ae6b49b..8544c26 100644
--- a/4.24/platform.html
+++ b/4.24/platform.html
@@ -192,7 +192,7 @@
   </tr>
   -->	
   <!-- ******************* End of General Updates ************************************* -->
-  <td colspan="2">
+  <tr><td colspan="2"/></tr>
 </tbody>
 </table>
 <!-- ****************** END OF N&N TABLE ****************** -->
diff --git a/4.24/platform_isv.html b/4.24/platform_isv.html
index eba3136..b15d348 100644
--- a/4.24/platform_isv.html
+++ b/4.24/platform_isv.html
@@ -56,10 +56,10 @@
 	</td>
   </tr>
   <tr id="EclipseContextFactory"> <!-- https://github.com/eclipse-platform/eclipse.platform.runtime/issues/43 -->
-	<td class="title"><a href="#EclipseContextFactory">New EclipseContextFactory<br/>.getServiceContext(Class<?>) method</a></td>
+	<td class="title"><a href="#EclipseContextFactory">New EclipseContextFactory<br/>.getServiceContext(Class&lt;?&gt;) method</a></td>
 	<td class="content">
 		<p>
-		There is now a new <code>EclipseContextFactory.getServiceContext(Class<?>)</code> method that could be used to acquire an E4 Service Context containing all OSGi services using a context class.
+		There is now a new <code>EclipseContextFactory.getServiceContext(Class&lt;?&gt;)</code> method that could be used to acquire an E4 Service Context containing all OSGi services using a context class.
 		This becomes handy in situations where you neither has an E4 context nor an OSGi context at hand (e.g. E3 legacy code) but still want to inject some fields or create injected objects.
 		</p>
 	</td>
@@ -86,7 +86,7 @@
 	</td>
   </tr>
   <!-- *********************** End of SWT *********************** -->
-  <td colspan="2">	
+  <tr><td colspan="2"/></tr>
 </tbody>
 </table>
 <!-- ****************** END OF N&N TABLE ****************** -->