[Nmh-workers] scan -width behaves oddly in 1.5RC3

I use scan with this scan form:

%5(msg)%<(cur)+%| %>%<{replied}-%|%<{encrypted}E%| %>%>\
%(date2local{date})\
%02(mon{date})/%02(mday{date}) %02(hour{date}):%02(min{date})\
%<{date} %|*%> \
%<(mymbox{from})=>%23(decode(friendly{to}))%|%25(decode(friendly{from}))%>  \
%(decode{subject}) (%(putnum(size)))

(I forget the provenance of this thing, but it's likely a modified
version of what exmh supplies.)  In addition to the -form argument, exmh
sticks in a -width argument.  That's always behaved as expected with nmh
1.0.4, but something weird is happening with the final putnum call in
1.5RC3: sometimes, when the line is almost full, I see "()" at the end,
where I would expect to see "(" and a digit or two, the rest being
suppressed by the width limit.  Here is an example:

$ scan -width 94 81868 
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix socket
$ scan -width 95 81868 
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets
$ scan -width 96 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets 
$ scan -width 97 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets (
$ scan -width 98 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets ()
$ scan -width 99 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets ()
$ scan -width 100 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets ()
$ scan -width 101 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets (3413
$ scan -width 102 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets (3413)
$ scan -width 103 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets (3413)
$ scan -width 104 81868
81868+ 06/06 09:50  Honza Horak                [HACKERS] Ability to listen on 
two unix sockets (3413)

(The -form argument is coming from .mh_profile, btw.)

It sorta looks like putnum has been taught not to put in any of the
number unless it will all fit, which to my mind is not an improvement;
it doesn't meet the principle of least astonishment anyway.  Is this
intentional, or just a bug?  If the latter, any suggestions where to
look to debug it?

                        regards, tom lane

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