How to test draw page grid lines?

[Regina Henschel]

Hi all,

I have a fix for bug "Grid does not work in RTL sheet"
[https://bugs.documentfoundation.org/show_bug.cgi?id=137083]
[https://gerrit.libreoffice.org/c/core/+/108989]

But I have no idea how to test it. Error was, that the coordinates of 
the grid lines were wrongly calculated and so the lines were outside the 
sheet and thus not visible. (This is about the grid you can enable in 
View > Grid and Helplines, not about the lines between cells.)

Any idea?

Kind regards
Regina