Change record status: 
Project: 
Introduced in branch: 
8.7.x
Introduced in version: 
8.7.0
Description: 

The constant \Drupal\Core\StringTranslation\PluralTranslatableMarkup::DELIMITER used for splitting plural strings.
As this functionality used in low level component it is defined there now \Drupal\Component\Gettext\PoItem::DELIMITER

All code using PluralTranslatableMarkup::DELIMITER or LOCALE_PLURAL_DELIMITER should use constant \Drupal\Component\Gettext\PoItem::DELIMITER

Before

if (strpos($value, PluralTranslatableMarkup::DELIMITER) !== FALSE) {
 // Process plural string.
}

After

if (strpos($value, PoItem::DELIMITER) !== FALSE) {
 // Process plural string.
}
Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done