WPF/PresentationCore-Windows : Generate XML files from most recent RC1 WPF source and update docs with DocsPortingTool

xml/Microsoft.Build.Tasks/CreateProperty.xml

@@ -161,8 +161,8 @@
                         Output TaskParameter="Value" PropertyName="MyTargetsToBuild"
                     /CreateProperty
 
-            We need to respect the semicolon that they put in the value, and need to treat
-            this exactly as if they had done:
+            We need to respect the semicolon that he put in the value, and need to treat
+            this exactly as if he had done:
 
                     PropertyGroup
                         MyTargetsToBuild="Clean;Build"