deprecated the spaceless tag

CHANGELOG

@@ -1,5 +1,7 @@
 * 2.7.0 (2019-XX-XX)
 
+ * deprecated the spaceless tag
+ * added a spaceless filter
  * added max value to the "random" function
  * deprecated Twig\Extension\InitRuntimeInterface
  * deprecated Twig\Loader\ExistsLoaderInterface

doc/deprecated.rst

@@ -28,6 +28,10 @@ Errors
 Tags
 ----
 
+* The ``spaceless`` tag is deprecated in Twig 2.7. Use the ``spaceless`` filter
+  instead or ``{% filter spaceless %}`` (the ``Twig\Node\SpacelessNode`` and
+  ``Twig\TokenParser\SpacelessTokenParser`` classes are also deprecated).
+
 * Using the ``spaceless`` tag at the root level of a child template is
   deprecated in Twig 2.5.0. This does not work as one would expect it to work
   anyway. In Twig 3.0, it will throw a ``Twig\Error\SyntaxError`` exception.

src/Node/SpacelessNode.php

@@ -18,6 +18,8 @@ use Twig\Compiler;
  *
  * It removes spaces between HTML tags.
  *
+ * @deprecated since Twig 2.7, to be removed in 3.0
+ *
  * @author Fabien Potencier <fabien@symfony.com>
  */
 class SpacelessNode extends Node implements NodeOutputInterface

src/TokenParser/SpacelessTokenParser.php

@@ -23,6 +23,8 @@ use Twig\Token;
  *      </div>
  *   {% endspaceless %}
  *   {# output will be <div><strong>foo</strong></div> #}
+ *
+ * @deprecated since Twig 2.7, to be removed in 3.0 (use the spaceless filter instead)
  */
 final class SpacelessTokenParser extends AbstractTokenParser
 {