unsharing rtl too early

[Jeffrey A Law]

  In message < ord7mcejfd.fsf@tamanduatei.dcc.unicamp.br >you write:
  > On May 23, 2000, Jeffrey A Law <law@cygnus.com> wrote:
  > 
  > > Choose something other than "let" for the parameter name -- I have
  > > no idea what "let" is supposed to stand for :-) "blocks" might be a
  > > better name for that parameter.
  > 
  > I'm checking it in with `blk', to keep it short.
blk vs block?  I don't think trying to save 2 characters is worth the
time/effort.

jeff