Place Octave's warning and error IDs in to the "Octave" namespace (bug #56213). * oct-stream.cc (textscan_format_list::parse_char_class), ov-ch-mat.cc (octave_char_matrix::map): Use "Octave" namespace with initial capital rather than "octave" lowercase in warning_with_id. * fminbnd.m (guarded_eval), fminunc.m (guarded_eval), fsolve.m (guarded_eval): Place error IDs in to "Octave" namespace. * print.m (epstool, fig2dev, latexstandalone, lpr, pstoedit): Place error IDs in to "Octave" namespace. * __print_parse_opts__.m (convert2points): Place error IDs in to "Octave" namespace. * fzero.m, __ghostscript__.m, __gnuplot_print__.m, __opengl_print__.m, splinefit.m, strjoin.m, strsplit.m: Place error IDs in to "Octave" namespace.

--- a/scripts/plot/util/private/__opengl_print__.m	Wed Apr 24 21:21:06 2019 -0700
+++ b/scripts/plot/util/private/__opengl_print__.m	Thu Apr 25 08:48:19 2019 -0700
@@ -57,7 +57,7 @@
           suffix = ext;  # If user provides eps/ps/pdf suffix, use it.
         endif
       else
-        error ("print:invalid-suffix",
+        error ("Octave:print:invalid-suffix",
                "invalid suffix '%s' for device '%s'.",
                ext, lower (opts.devopt));
       endif