add missing spaces

Author: gewarren

xml/System.Net.Http/HttpClient.xml

@@ -2358,7 +2358,7 @@ The <paramref name="requestUri" /> is not an absolute URI.
       <Docs>
         <param name="requestUri">The URI the request is sent to.</param>
         <param name="content">The HTTP request content sent to the server.</param>
-        <summary>Sends a PATCH request to a URIdesignated as a string as an asynchronous operation.</summary>
+        <summary>Sends a PATCH request to a URI designated as a string as an asynchronous operation.</summary>
         <returns>The task object representing the asynchronous operation.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[
@@ -2460,7 +2460,7 @@ The <paramref name="requestUri" /> is not an absolute URI.
         <param name="requestUri">The URI the request is sent to.</param>
         <param name="content">The HTTP request content sent to the server.</param>
         <param name="cancellationToken">A cancellation token that can be used by other objects or threads to receive notice of cancellation.</param>
-        <summary>Sends a PATCH request with a cancellation token to a URIrepresented as a string as an asynchronous operation.</summary>
+        <summary>Sends a PATCH request with a cancellation token to a URI represented as a string as an asynchronous operation.</summary>
         <returns>The task object representing the asynchronous operation.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[