Merge pull request #860 from AvaloniaUI/mrlacey-patch-2

Fix XAML markup for OnPlatform structure

Author: luke-whos-here

docs/guides/platforms/platform-specific-code/xaml.md

@@ -58,7 +58,7 @@ OnPlatform can also be used in XML syntax for defining property values:
         </OnPlatform.Default>
         <OnPlatform.iOS>
             <ToggleSwitch Content="Hello iOS" />
-        </OnPlatform.Windows>
+        </OnPlatform.iOS>
     </OnPlatform>
 </StackPanel>
 ```
@@ -123,4 +123,4 @@ The `OnFormFactor` markup extension functions similarly to the `OnPlatform` and
 </UserControl>
 ```
 
-`OnFormFactor` doesn't have any compile-time trimming optimizations, as form factor cannot be known in compile time. None of these markup extensions are dynamic; once a value is set, it will not be changed.
+`OnFormFactor` doesn't have any compile-time trimming optimizations, as form factor cannot be known in compile time. None of these markup extensions are dynamic; once a value is set, it will not be changed.