improve an undo test case
improve an undo test case

svn path=/trunk/KDE/kdelibs/kate/; revision=1123364

cmacq2/kate,DickJ/kate,hlamer/kate,DickJ/kate,cmacq2/kate,hlamer/kate,jfmcarreira/kate,DickJ/kate,hlamer/kate,hlamer/kate,DickJ/kate,hlamer/kate,jfmcarreira/kate,cmacq2/kate,hlamer/kate,hlamer/kate,sandsmark/kate,hlamer/kate,sandsmark/kate,jfmcarreira/kate,hlamer/kate,sandsmark/kate,sandsmark/kate,hlamer/kate