strip trailing whitespace from most source files * NEWS, doc/interpreter/contributors.in, doc/interpreter/func.txi, doc/interpreter/genpropdoc.m, doc/interpreter/octave_logo.eps, doc/interpreter/plot.txi, doc/interpreter/stmt.txi, examples/data/Makefile.am, libinterp/corefcn/data.cc, libinterp/corefcn/debug.cc, libinterp/corefcn/error.cc, libinterp/corefcn/file-io.cc, libinterp/corefcn/gl-render.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/graphics.in.h, libinterp/corefcn/load-path.cc, libinterp/corefcn/pr-output.cc, libinterp/corefcn/pt-jit.cc, libinterp/corefcn/strfind.cc, libinterp/corefcn/toplev.cc, libinterp/corefcn/toplev.h, libinterp/corefcn/urlwrite.cc, libinterp/corefcn/variables.cc, libinterp/octave-value/ov-classdef.cc, libinterp/octave-value/ov-classdef.h, libinterp/octave.cc, libinterp/parse-tree/lex.h, libinterp/parse-tree/oct-parse.in.yy, libinterp/parse-tree/pt-classdef.h, liboctave/system/file-ops.cc, liboctave/system/oct-env.cc, m4/acinclude.m4, scripts/deprecated/finite.m, scripts/deprecated/fmod.m, scripts/deprecated/fnmatch.m, scripts/deprecated/luinc.m, scripts/deprecated/octave_tmp_file_name.m, scripts/deprecated/syl.m, scripts/deprecated/usage.m, scripts/general/inputParser.m, scripts/general/interp1.m, scripts/general/interp2.m, scripts/general/interp3.m, scripts/general/isequal.m, scripts/general/private/__isequal__.m, scripts/geometry/voronoi.m, scripts/image/image.m, scripts/image/imshow.m, scripts/image/ind2rgb.m, scripts/linear-algebra/bandwidth.m, scripts/linear-algebra/isbanded.m, scripts/miscellaneous/bzip2.m, scripts/miscellaneous/cast.m, scripts/miscellaneous/copyfile.m, scripts/miscellaneous/delete.m, scripts/miscellaneous/fullfile.m, scripts/miscellaneous/getappdata.m, scripts/miscellaneous/gunzip.m, scripts/miscellaneous/isappdata.m, scripts/miscellaneous/ls.m, scripts/miscellaneous/mex.m, scripts/miscellaneous/movefile.m, scripts/miscellaneous/orderfields.m, scripts/miscellaneous/recycle.m, scripts/miscellaneous/rmappdata.m, scripts/miscellaneous/setfield.m, scripts/miscellaneous/symvar.m, scripts/miscellaneous/tar.m, scripts/miscellaneous/tmpnam.m, scripts/miscellaneous/unpack.m, scripts/miscellaneous/ver.m, scripts/miscellaneous/what.m, scripts/miscellaneous/xor.m, scripts/miscellaneous/zip.m, scripts/optimization/fminbnd.m, scripts/optimization/sqp.m, scripts/path/private/getsavepath.m, scripts/path/savepath.m, scripts/pkg/pkg.m, scripts/pkg/private/installed_packages.m, scripts/plot/draw/plotyy.m, scripts/plot/draw/polar.m, scripts/plot/draw/private/__quiver__.m, scripts/plot/draw/private/__scatter__.m, scripts/plot/draw/private/__stem__.m, scripts/plot/draw/surface.m, scripts/plot/draw/surfnorm.m, scripts/plot/util/copyobj.m, scripts/plot/util/hgload.m, scripts/plot/util/hgsave.m, scripts/plot/util/isprop.m, scripts/plot/util/linkprop.m, scripts/plot/util/private/__go_draw_axes__.m, scripts/set/setdiff.m, scripts/set/union.m, scripts/signal/periodogram.m, scripts/sparse/eigs.m, scripts/sparse/ilu.m, scripts/sparse/qmr.m, scripts/sparse/sprand.m, scripts/sparse/sprandn.m, scripts/specfun/beta.m, scripts/specfun/ellipke.m, scripts/specfun/isprime.m, scripts/statistics/base/lscov.m, scripts/testfun/__run_test_suite__.m, scripts/testfun/test.m: Strip trailing whitespace.

## Copyright (C) 2006-2013 John W. Eaton
##
## 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
## <http://www.gnu.org/licenses/>.

%!test
%! eval ("clear a; a;", "");

%!test
%! eval ("", "error ('Should not get here');");

%!test
%! eval ("clear a; a; x = 0;", "x = 1;");
%! assert (x, 1);

%!test
%! eval ("clear a; a; str = '';", "str=lasterr;");
%! assert (lasterr()(1:13), "'a' undefined");
%! assert (str(1:13), "'a' undefined");

%!test
%! eval ("error ('user-defined error'); str = '';", "str = lasterr;");
%! assert (lasterr()(1:18), "user-defined error");
%! assert (str(1:18), "user-defined error");

%!function ms = mangle (s)
%!  ## Wrap angle brackets around S.
%!  ms = ["<" s ">"];
%!endfunction
%!test
%! eval ("clear a; a; str='';", "str = mangle (lasterr);");
%! assert (mangle (lasterr)(1:14), "<'a' undefined");
%! assert (str(1:14), "<'a' undefined");

%!test
%! eval ("eval (\"clear a; a;str1='';\", \"str1=lasterr;\"); clear b; b; str2='';",
%! "str2 = lasterr;");
%! assert (str1(1:13), "'a' undefined");
%! assert (str2(1:13), "'b' undefined");

%!test
%! eval ("clear a; a; str1='';",
%! "eval (\"clear b; b; str2='';\", \"str2=lasterr;\"); str1=lasterr;");
%! assert (str1(1:13), "'b' undefined");
%! assert (str2(1:13), "'b' undefined");

%!test
%! eval ("eval (\"clear a; a; str='';\",\"error (cstrcat (\\\"rethrow: \\\", lasterr));str='';\");",
%! "str=lasterr;");
%! assert (str(1:22), "rethrow: 'a' undefined");