Add missing semi-colon (#2850)

Author: Youssef1313

xml/System/Exception.xml

@@ -1,4 +1,4 @@
-<Type Name="Exception" FullName="System.Exception">
+<Type Name="Exception" FullName="System.Exception">
   <TypeSignature Language="C#" Value="public class Exception : System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable" />
   <TypeSignature Language="ILAsm" Value=".class public sequential ansi serializable beforefieldinit Exception extends System.Object implements class System.Runtime.InteropServices._Exception, class System.Runtime.Serialization.ISerializable" />
   <TypeSignature Language="DocId" Value="T:System.Exception" />
@@ -155,8 +155,8 @@
   
  In contrast, if the exception is re-thrown by using the  
   
-```csharp  
-throw e  
+```csharp
+throw e;
 ```  
   
 ```vb  
@@ -1385,4 +1385,4 @@ Stack Trace:
       </Docs>
     </Member>
   </Members>
-</Type>
+</Type>