TYPO3 Core

If the image field is last in showitem and is not followed directly by the closing single tick the thumbnail does not get rendered

Not working

    'types' => [
        '0' => [
            'showitem' => '
                --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:general,
                    --palette--;;information,
                    --palette--;;privacy,
                    image
            ',
        ],
    ],

Working

    'types' => [
        '0' => [
            'showitem' => '
                --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:general,
                    --palette--;;information,
                    --palette--;;privacy,
                    image',
        ],
    ],

This is because of a preg_match in \TYPO3\CMS\Recordlist\RecordList\DatabaseRecordList

'/(^|(.*(;|,)?))' . $thumbsCol . '(((;|,).*)|$)/'

which requires to have a comma and any character or the string end following the field name. Maybe we can change the pattern (;|,) to (;|,| ) to allow whitespaces aswell?