Merge branch '6.3' into 6.4

* 6.3:
  [Standards] Update code guidelines
  Update asset_mapper.rst

Author: javiereguiluz

contributing/code/standards.rst

@@ -190,6 +190,14 @@ Structure
 
 * Exception and error messages must start with a capital letter and finish with a dot ``.``;
 
+* Exception, error and deprecation messages containing a class name must
+  use ``get_debug_type()`` instead of ``::class`` to retrieve it:
+
+  .. code-block:: diff
+
+    - throw new \Exception(sprintf('Command "%s" failed.', $command::class));
+    + throw new \Exception(sprintf('Command "%s" failed.', get_debug_type($command)));
+
 * Do not use ``else``, ``elseif``, ``break`` after ``if`` and ``case`` conditions
   which return or throw something;
 

frontend/asset_mapper.rst

@@ -391,7 +391,7 @@ This *can* work with importmaps, but it should *not* be used for critical CSS
 that needs to be loaded before the page is rendered because the browser
 won't download the CSS until the JavaScript file executed.
 
-However, if you *do* want to lazily-load a CSS file, you an make this work
+However, if you *do* want to lazily-load a CSS file, you can make this work
 by using the ``importmap:require`` command and pointing it at a CSS file.
 
 .. code-block:: terminal