[Octave-bug-tracker] [bug #49341] demo legend 14 produce error with gnuplot

[Dan Sebald]

Follow-up Comment #5, bug #49341 (project octave):

OK, that's me.

Attached is a change to demo 17 which adds a second subplot with another
hggroup, stems.  (The error bars hggroup is covered well by the errorbar.m
demos.)  I think those are all the hggroup object collections.

The patch doesn't fix anything as far as bugs, but it brings out a couple
issues in both OpenGL and gnuplot toolkits.  For OpenGL, the legend placement
doesn't seem quite right in subplots and there is an axes border for only one
of the subplots.  For gnuplot, the legends are wrong.

By the way, for stems the proper legend graphic is simply the stem marker, is
that correct?  There is no other line in the legend like might be done for
error bars?

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