man/vzctl.8: simplify formatting for code example

Use raw troff macros
  .nf		no fill (let us remove annoying .br)
  .ps -1	make font smaller by 1 pt
  .ft CR	same as \f(CR
before the code example, and
  .fi		restore previous fill setting
  .ft		restore previous font

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed