ref: 33f5d0fe3fd40b57f0a36e3832637446446768f4
dir: vim/testdir/test51.ok
NewGroup xxx term=bold cterm=italic ctermfg=2 ctermbg=3 Group2 xxx cleared Group3 xxx term=underline cterm=bold NewGroup xxx cleared Group2 xxx cleared Group2 xxx cleared Group3 xxx cleared E475: term='asdf