" :force <expr> print <expr>, forcing unevaluated parts\n" ++
" :forward go forward in the history (after :back)\n" ++
" :history [<n>] after :trace, show the execution history\n" ++
" :force <expr> print <expr>, forcing unevaluated parts\n" ++
" :forward go forward in the history (after :back)\n" ++
" :history [<n>] after :trace, show the execution history\n" ++