TYPO3 Core

In backend forms, if one generates a slug manually by pressing the "recreate" button next to a slug field, the visual output (label indicating the successful/failed slug proposal) is broken if no slash is defined to be prepended.

To test this, one can easily add a (or use an existing) slug field to a table other than "pages" (as slash prepending is here enabled by default) without defining the prependsSlash configuration in TCA (or setting it explicitly to false). Now, if one recreates the slug in backend form, the visual output should look like this:

For the visual output, we should ensure the proposal is always prepended by a slash in order to make the visual output more clear. It should then look like this (note the slash between "en" and "subpage-1"):

The value itself should not be touched anytime, it's just about visual beauty :)