[TASK] Add unit test to cover stdWrap_listNum

Resolves: #76754
Releases: master
Change-Id: Id941d1484de116c6a92b119066f0de67ac06ea8f
Reviewed-on: https://review.typo3.org/48651


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>