Fixed pragma example.

Dirk Lemstra · Dirk Lemstra · commit b1879e193bb2 · 2016-12-12T11:11:33.000+01:00
diff --git a/documentation/SA1310.md b/documentation/SA1310.md
@@ -36,6 +36,6 @@ To fix a violation of this rule, remove the underscore from the name of the fiel
 ```
 
 ```csharp
-#pragma warning disable  // 
-#pragma warning restore  // 
+#pragma warning disable SA1310 // FieldNamesMustNotContainUnderscore
+#pragma warning restore SA1310 // FieldNamesMustNotContainUnderscore
 ```
