mutt: quieten notmuch runs
mutt: quieten notmuch runs

Swallow stderr in order to get rid of these noisy messages:

  Note: Ignoring non-mail file: /Users/glh/.mail/Home/Home/.mbsyncstate
  Note: Ignoring non-mail file: /Users/glh/.mail/Home/Home/.mbsyncstate.journal
  Note: Ignoring non-mail file: /Users/glh/.mail/Home/Home/.mbsyncstate.lock
  Note: Ignoring non-mail file: /Users/glh/.mail/Home/Home/.mbsyncstate.new
  Note: Ignoring non-mail file: /Users/glh/.mail/Home/Home/.uidvalidity

On stdout we still get the bit we're really interested in:

  Processed 15 total files in almost no time.
  No new mail.

Not worried about missing any legit errors due to this redirection; in
months of using notmuch I don't recall ever see it choking on anything.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent