update some comments

Co-Authored-By: Bond-009 <bond.009@outlook.com>

Emby.Server.Implementations/Library/LibraryManager.cs

@@ -1077,7 +1077,7 @@ namespace Emby.Server.Implementations.Library
 
             innerProgress.RegisterAction(pct => progress.Report(pct * pct * 0.96));
 
-            // validate the entire media library
+            // Validate the entire media library
             await RootFolder.ValidateChildren(innerProgress, cancellationToken, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), recursive: true).ConfigureAwait(false);
 
             progress.Report(96);

Emby.Server.Implementations/Library/UserManager.cs

@@ -291,10 +291,10 @@ namespace Emby.Server.Implementations.Library
                     && authenticationProvider != null
                     && !(authenticationProvider is DefaultAuthenticationProvider))
                 {
-                    // trust the username returned by the authentication provider
+                    // Trust the username returned by the authentication provider
                     username = updatedUsername;
 
-                    // search the database for the user again
+                    // Search the database for the user again
                     // the authentication provider might have created it
                     user = Users
                         .FirstOrDefault(i => string.Equals(username, i.Name, StringComparison.OrdinalIgnoreCase));

MediaBrowser.Api/UserService.cs

@@ -394,7 +394,7 @@ namespace MediaBrowser.Api
                 throw new MethodNotAllowedException("Hashed-only passwords are not valid for this API.");
             }
 
-            // password should always be null
+            // Password should always be null
             return Post(new AuthenticateUserByName
             {
                 Username = user.Name,