Token in summary containing ampersand is not decoded [#3591621]

Problem/Motivation

If you have a node with a title like "Something & Something Else", and you use the [node:title] token as the value for the ICS summary, then the ICS is outputted with the summary/title "Something & amp ; Something Else". (spaces added so CKEditor does not decode it)

Steps to reproduce

Proposed resolution

We need to run \Drupal\Component\Utility\Html::decodeEntities on the value before setting the summary.

Remaining tasks

User interface changes

API changes

Data model changes

Issue fork ics_field-3591621

Show commands

Start within a Git clone of the project using the version control instructions.

Add & fetch this issue fork’s repository

Or, if you do not have SSH keys set up on git.drupalcode.org:

Add & fetch this issue fork’s repository

3591621-token-in-summary changes, plain diff MR !27
Check out this branch for the first time

Check out existing branch, if you already have it locally