maint: Eliminate single "Author:" lines from code base. * color-picker.cc, color-picker.h, octave-qscintilla.cc, octave-qscintilla.h, octave-txt-lexer.cc, octave-txt-lexer.h, balance.cc, kron.cc, lookup.cc, ls-hdf5.cc, ls-mat5.cc, ls-oct-text.cc, sylvester.cc, tsearch.cc, jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.cc, jit-util.h, pt-jit.cc, pt-jit.h, Array-jit.cc, bsxfun.h, url-transfer.cc, url-transfer.h, acosd.m, acotd.m, acscd.m, asecd.m, asind.m, atand.m, cosd.m, cotd.m, cscd.m, secd.m, sind.m, tand.m, cart2pol.m, cart2sph.m, curl.m, del2.m, divergence.m, flip.m, pol2cart.m, randi.m, sortrows.m, sph2cart.m, griddata3.m, griddatan.m, rectint.m, voronoi.m, dialog.m, guidata.m, guihandles.m, __file_filter__.m, __fltk_file_filter__.m, __get_funcname__.m, __is_function__.m, __uigetdir_fltk__.m, __uigetfile_fltk__.m, __uiobject_split_args__.m, __uiputfile_fltk__.m, uibuttongroup.m, uicontextmenu.m, uicontrol.m, uigetdir.m, uigetfile.m, uimenu.m, uipanel.m, uipushtool.m, uiputfile.m, uiresume.m, uitoggletool.m, uitoolbar.m, uiwait.m, doc.m, autumn.m, bone.m, cmpermute.m, cmunique.m, cool.m, copper.m, cubehelix.m, flag.m, frame2im.m, hot.m, hsv.m, hsv2rgb.m, im2frame.m, imfinfo.m, imformats.m, iscolormap.m, jet.m, pink.m, prism.m, __imfinfo__.m, rainbow.m, rgb2hsv.m, spinmap.m, spring.m, viridis.m, white.m, winter.m, importdata.m, strmatch.m, bandwidth.m, isbanded.m, isdiag.m, istril.m, istriu.m, krylov.m, linsolve.m, logm.m, lscov.m, subspace.m, bunzip2.m, compare_versions.m, edit.m, fullfile.m, getfield.m, gunzip.m, inputParser.m, license.m, nargchk.m, narginchk.m, nthargout.m, python.m, setfield.m, tar.m, unpack.m, ver.m, zip.m, odeplot.m, fminbnd.m, fminunc.m, fsolve.m, fzero.m, glpk.m, humps.m, pathdef.m, savepath.m, diffuse.m, lighting.m, material.m, shading.m, specular.m, contour.m, ellipsoid.m, isocaps.m, isocolors.m, isonormals.m, isosurface.m, light.m, pcolor.m, __interp_cube__.m, __marching_cube__.m, __patch__.m, __stem__.m, reducepatch.m, reducevolume.m, ribbon.m, shrinkfaces.m, slice.m, stem.m, surf.m, surfl.m, tetramesh.m, waterfall.m, __actual_axis_position__.m, __next_line_color__.m, allchild.m, figure.m, findall.m, findobj.m, gcf.m, hggroup.m, isprop.m, ndgrid.m, __add_default_menu__.m, saveas.m, __splinefit__.m, prefdir.m, preferences.m, profexplore.m, profexport.m, profile.m, profshow.m, setdiff.m, freqz.m, freqz_plot.m, sinc.m, unwrap.m, pcr.m, qmr.m, sprandn.m, betaincinv.m, cosint.m, ellipke.m, factor.m, gammaincinv.m, legendre.m, nchoosek.m, primes.m, invhilb.m, toeplitz.m, erase.m, mat2str.m, strtrim.m, validatestring.m, fail.m, compare_plot_demos.m, dump_demos.m, html_compare_plot_demos.m, addtodate.m, datenum.m, jit.tst: Eliminate single "Author:" lines from code base.

########################################################################
##
## Copyright (C) 1999-2020 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## This file is part of Octave.
##
## Octave is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, see
## <https://www.gnu.org/licenses/>.
##
########################################################################

## -*- texinfo -*-
## @deftypefn  {} {@var{map} =} flag ()
## @deftypefnx {} {@var{map} =} flag (@var{n})
## Create color colormap.  This colormap cycles through red, white, blue, and
## black with each index change.
##
## The argument @var{n} must be a scalar.
## If unspecified, the length of the current colormap, or 64, is used.
## @seealso{colormap}
## @end deftypefn

function map = flag (n)

  if (nargin > 1)
    print_usage ();
  elseif (nargin == 1)
    if (! isscalar (n))
      error ("flag: N must be a scalar");
    endif
    n = double (n);
  else
    hf = get (0, "currentfigure");
    if (! isempty (hf))
      n = rows (get (hf, "colormap"));
    else
      n = 64;
    endif
  endif
  if (n == 1)
    map = [1, 0, 0];
  elseif (n > 1)
    C = [1, 0, 0; 1, 1, 1; 0, 0, 1; 0, 0, 0];
    map = C(rem (0:(n-1), 4) + 1, :);
  else
    map = zeros (0, 3);
  endif

endfunction


%!demo
%! ## Show the 'flag' colormap profile and as an image
%! cmap = flag (12);  # 4 colors, therefore cycle 3 times
%! subplot (2, 1, 1);
%!  rgbplot (cmap, "composite");
%! subplot (2, 1, 2);
%!  rgbplot (cmap);