[TASK] Add unit tests for stdWrap_numberFormat()

Resolves: #70165
Releases: master
Change-Id: Ib8bc39be416d7030ce33e8cc8bd65dc4a2abb211
Reviewed-on: http://review.typo3.org/43619


Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>