Multiline labels in graphics

[Moritz Borgmann]

MATLAB allows to specify cell arrays as arguments to title, xlabel, 
etc. The elements of the cell array will then be displayed on 
multiple lines. Octave doesn't accept cell arrays, unfortunately.

I tried to patch Octave to support cell arrays; the attached 
rudimentary patch works in principle, but has a problem: with 
enhanced text terminals, the warnings

enhanced text mode parser - ignoring spurious }
enhanced text mode parser - ignoring spurious }

from Gnuplot are dumped. I assume that the graphics code implicitly 
assumes there's no newlines in the texts.

Does somebody with better knowledge of the graphics code have a clue 
what's going on, and even better, find a way how to fix the problem?

Thanks,

Moritz

multiline_labels.changeset
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