-# Allows escape sequences:
-# (\n = newline, \r = carriage-return, \t = tab, \f = formfeed)
-#
-# %a Author address %b original mbox %B destination list or mbox
-# %c bytes in message %C Message number
-# %d date and time in senders timezone ($date_format)
-# %D date and time in local timezone ($date_format)
-# %e curr. msg no in thread %E number of msgs in curr. thread
-# %f address+real name %F address+realname (unless self)
-# %i Message-ID %l number of lines %L list-from function
-# %m # of msg in mbox %M number of hidden messages in collapsed thread
-# %n author real name %N score %s subject of msg
-# %S status of message (N/D/d/!/*/r)
-# %t `to:' field %T char from tochars %u login name of author
-# %v author's firstname %y X-Label %Y X-Label, if changed
-# %Z message status flags
-# %>X right justify the rest of the string and pad with character "X"
-# %|X pad to the end of the line with character "X"
-# %{<s>} sent time+date in senders timezone (<s> is an strftime(3) expression)
-# %[<s>] sent time+date in local timezone (<s> is an strftime(3) expression)
-# %(<s>) receive time+date in local timezone (<s> is an strftime(3) expression)
-# %<<s>> current time in local timezone (<s> is an strftime(3) expression)
-# if first char in <s> is "!", do not use locale.
-