maint: Refactor pkg.m and move subfunctions to private/ directory. * pkg.m: move all sub-functions to private/ * pkg/private/absolute_pathname.m * pkg/private/build.m * pkg/private/configure_make.m * pkg/private/copy_files.m * pkg/private/create_pkgadddel.m * pkg/private/describe.m * pkg/private/dirempty.m * pkg/private/extract_pkg.m * pkg/private/finish_installation.m * pkg/private/fix_depends.m * pkg/private/fix_version.m * pkg/private/generate_lookfor_cache.m * pkg/private/get_description.m * pkg/private/get_forge_download.m * pkg/private/get_forge_pkg.m * pkg/private/getarch.m * pkg/private/getarchdir.m * pkg/private/getarchprefix.m * pkg/private/get_unsatisfied_deps.m * pkg/private/install.m * pkg/private/installed_packages.m * pkg/private/is_architecture_dependent.m * pkg/private/isautoload.m * pkg/private/issuperuser.m * pkg/private/list_forge_packages.m * pkg/private/load_package_dirs.m * pkg/private/load_packages.m * pkg/private/load_packages_and_dependencies.m * pkg/private/packinfo_copy_file.m * pkg/private/parse_pkg_idx.m * pkg/private/prepare_installation.m * pkg/private/print_package_description.m * pkg/private/rebuild.m * pkg/private/repackage.m * pkg/private/rm_rf.m * pkg/private/rstrip.m * pkg/private/save_order.m * pkg/private/shell.m * pkg/private/split_by.m * pkg/private/strip.m * pkg/private/uninstall.m * pkg/private/unload_packages.m * pkg/private/verify_directory.m * pkg/private/write_index.m

new file mode 100644
--- /dev/null
+++ b/scripts/pkg/private/strip.m
@@ -0,0 +1,36 @@
+## Copyright (C) 2005-2012 S�ren Hauberg
+## Copyright (C) 2010 VZLU Prague, a.s.
+##
+## 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/>.
+
+## -*- texinfo -*-
+## @deftypefn  {Function File} {text =} strip (@var{text})
+## Undocumented internal function.
+## @end deftypefn
+
+
+## Strip the text of spaces from the left and the right.
+## Example: "  hello world  " => "hello world"
+function text = strip (text)
+  chars = find (! isspace (text));
+  if (length (chars) > 0)
+    text = text(chars(1):chars(end));
+  else
+    text = "";
+  endif
+endfunction
+