minor #19410 [Form] Add option separator to ChoiceType to use a custom separator after preferred choices (alamirault)

This PR was merged into the 7.1 branch.

Discussion
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[Form] Add option `separator` to `ChoiceType` to use a custom separator after preferred choices

Fix #19400

Commits
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8e5a164 [Form] Add option separator to ChoiceType to use a custom separator after preferred choices

Author: javiereguiluz

reference/constraints/Choice.rst

@@ -389,3 +389,25 @@ Parameter        Description
 ===============  ==============================================================
 
 .. include:: /reference/constraints/_payload-option.rst.inc
+
+``separator``
+~~~~~~~~~~~~~
+
+**type**: ``string`` **default**: ``-------------------``
+
+This option allows you to customize separator after preferred choices.
+
+.. versionadded:: 7.1
+
+    The ``separator`` option was introduced in Symfony 7.1.
+
+``separator_html``
+~~~~~~~~~~~~~~~~~~
+
+**type**: ``boolean`` **default**: ``false``
+
+If this option is true, `separator`_ option will be display as HTML instead of text
+
+.. versionadded:: 7.1
+
+    The ``separator_html`` option was introduced in Symfony 7.1.