Say that pdumping cannot redump unless -batch is used. Say that the traditional unexec dumping method is by default not available, and is deprecated. Don't call dump files "portable", as dump files are not any more portable than the Emacs executables themselves. Just call them "dump files". Similar, prefer "portable dumper" (since the dumper code is portable) to "portable dumping" (since the dump file is not). Be more systematic about calling them "dump files" instead of "dumped images" or whatnot.
This directory contains the architecture-independent files used by or with Emacs. This includes some text files of documentation for GNU Emacs or of interest to Emacs users, and the file of dumped docstrings for Emacs functions and variables. COPYRIGHT AND LICENSE INFORMATION FOR IMAGE FILES File: emacs.icon Author: Sun Microsystems, Inc Copyright (C) 1999, 2001-2019 Free Software Foundation, Inc. License: GNU General Public License version 3 or later (see COPYING)