[GH Usage] Updated Feature flag doc

Author: mogah

src/NuGetGallery/Services/IFeatureFlagService.cs

@@ -54,11 +54,11 @@ public interface IFeatureFlagService
         bool IsSearchSideBySideEnabled(User user);
 
         /// <summary>
-        /// Whether a user can see the "GitHub Usage" section in a package's display page as well as 
-        /// well as the added "GitHub Usage count" in the "Statistics" section
+        /// Whether a user can see the "GitHub Usage" section in a package's display page as well
+        /// as the added "GitHub Usage count" in the "Statistics" section
         /// </summary>
-        /// <param name="user"></param>
-        /// <returns></returns>
+        /// <param name="user">The user to test fot the Flight</param>
+        /// <returns>Whether or not the Flight is enabled for the user</returns>
         bool IsGitHubUsageEnabled(User user);
     }
 }