[ferret_users] go margins: factor 2 too large

[Marco van Hulten <Marco.Hulten@xxxxxx>]

Hello!

When I try to set margins of one tic size (of a viewport), they appear
to be inconsistent with the TICS size:

    set window/aspect=.6
    ppl list tics
         SMALL XTIC= 1.250E-01   LARGE XTIC= 2.500E-01
         SMALL YTIC= 1.250E-01   LARGE YTIC= 2.500E-01
         X AXIS TICS OUTSIDE   Y AXIS TICS OUTSIDE
    use levitus_climatology
    set view left
    shade/set_up/nokey temp[k=1]
    ppl axnmtc,1,1
    go margins 0,0,0.25,0.25
    ppl shade
    set view right
    ppl shade
    shade/set_up/nokey temp[k=1]
    ppl axnmtc,1,1
    go margins 0,0,0.25,0.25
    ppl shade

In the resulting plots there are both small and large tics.  The large
tics should be connecting, but it seems that the margin is a factor of
two too large, or that the actual LARGE {X,Y}TIC sizes are 0.125
instead of 0.25.

When I use the value of 0.125 for the left and right margins, the large
tics are nicely connecting (and the small tics are not).
When I set all margins to zero, the plots are tight to each other, as
expected.

 - Marco