C76807: Adding missing space (#11598)

Localization team has reported source content issue that causes localized version to have broken/different format compared to en-us version.

Author: v-makoud

docs/framework/xaml-services/understanding-xaml-node-stream-structures-and-concepts.md

@@ -213,7 +213,7 @@ The following list notes all cases where a XAML reader is expected to introduce
 
 - **Unknown content:** The name of this member node is `_UnknownContent`. Strictly speaking, it is a <xref:System.Xaml.XamlDirective>, and it is defined in the XAML language XAML namespace. This directive is used as a sentinel for cases where a XAML object element contains content in the source XAML but no content property can be determined under the currently available XAML schema context. You can detect this case in a XAML node stream by checking for members named `_UnknownContent`. If no other action is taken in a load path XAML node stream, the default <xref:System.Xaml.XamlObjectWriter> throws on attempted `WriteEndObject` when it encounters the `_UnknownContent` member on any object. The default <xref:System.Xaml.XamlXmlWriter> does not throw, and treats the member as implicit. You can get a static entity for `_UnknownContent` from <xref:System.Xaml.XamlLanguage.UnknownContent%2A>.
 
-- **Collection property of a collection:**Although the backing CLR type of a collection class that is used for XAML usually has a dedicated named property that holds the collection items, that property is not known to a XAML type system prior to backing type resolution. Instead, the XAML node stream introduces an `Items` placeholder as a member of the collection XAML type. In the .NET Framework XAML Services implementation the name of this directive / member in the node stream is `_Items`. A constant for this directive can be obtained from <xref:System.Xaml.XamlLanguage.Items%2A>.
+- **Collection property of a collection:** Although the backing CLR type of a collection class that is used for XAML usually has a dedicated named property that holds the collection items, that property is not known to a XAML type system prior to backing type resolution. Instead, the XAML node stream introduces an `Items` placeholder as a member of the collection XAML type. In the .NET Framework XAML Services implementation the name of this directive / member in the node stream is `_Items`. A constant for this directive can be obtained from <xref:System.Xaml.XamlLanguage.Items%2A>.
 
     Note that a XAML node stream might contain an Items property with items that turn out to not be parsable based on the backing type resolution and XAML schema context. For example,