Reformatting graphics demos

[John W. Eaton]

I just noticed this change:

o  changeset:   22566:1c4cd12987f5
|  user:        Rik <address@hidden>
|  date:        Mon Aug 15 15:15:30 2016 -0700
|  summary:     Use Octave syntax in graphics demos.

I prefer Octave syntax as well, but I thought we used Matlab-compatible 
syntax for those demos so it would be possible to run them in Matlab and 
easily compare the appearance of plots.  Is that no longer a goal? 
Sorry if I missed a discussion about this.

jwe