In ddb ps, left justify the non-numeric fields 'state' and 'wmesg' and
the fixed-width numeric field 'wchan', as in ps(1). They were sort
of centered, although the template shows 'state' as right-justified.
The `wmesg' field very rarely has a prefix of '*' (for lock names)
that is still to the left of the header, and the width of this field
is reduced from 8 to 7 (more than 6 is an error).

The 'wmesg' and 'wchan' fields are still misnamed and poorly handled.
They are named sort of backwards relative to ps(1):

• wmesg in ddb = mwchan in ps
• wmesg in ddb = wchan in ps (if it is a wait channel name, not a lock name)
• wchan in ddb = nwchan in ps

ddb ps wastes lots of space for the unimportant 'wchan' field (20
columns altogether on 64-bit arches). ps(1) documents using a
compressed format, but the compression only omits leading nybbles of
0 so it has neveqr worked on arches that put the kernel in the top half
of the address space. It just avoids wasting space for an 0x prefix.