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For completeness, I want to present this awesome functions that I collected (stole) from romainl.

" redirect the output of a Vim or external command into a scratch buffer
function! Redir(cmd)
  if a:cmd =~ '^!'
    execute "let output = system('" . substitute(a:cmd, '^!', '', '') . "')"
  else
    redir => output
    execute a:cmd
    redir END
  endif
  tabnew
  setlocal nobuflisted buftype=nofile bufhidden=wipe noswapfile
  call setline(1, split(output, "\n"))
  put! = a:cmd
  put = '----'
endfunction
command! -nargs=1 Redir silent call Redir(<f-args>)

This will take normal or system command output and put it in a new tab. Feel free to change the line tabnew to vsplit or split etc.