" Remove persistent undo file with \U.
call Mapping("U", ":call <SID>Clear_Undo()<CR>:<CR>")
" Remove persistent undo file with \U.
call Mapping("U", ":call <SID>Clear_Undo()<CR>:<CR>")
" Use a persistent undo file if it exists.
fun! <SID>Check_Undo() "{{{2
if filereadable(undofile(expand("%")))
" Use a persistent undo file if it exists.
fun! <SID>Check_Undo() "{{{2
if filereadable(undofile(expand("%")))