[TASK] Write unit tests for stdWrap_trim() and stdWrap_intval()

Write unit tests for ContentObjectRenderer->stdWrap_trim()
and ContentObjectRenderer->stdWrap_intval()

Resolves: #70131
Releases: master
Change-Id: I37cb632c2a2aad284d5ec42cff500e14d022fcd8
Reviewed-on: http://review.typo3.org/43590


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>