GNU Emacs NEWS -- history of user-visible changes. Copyright (C) 2017 Free Software Foundation, Inc. See the end of the file for license conditions. Please send Emacs bug reports to bug-gnu-emacs@gnu.org. If possible, use M-x report-emacs-bug. This file is about changes in Emacs version 27. See file HISTORY for a list of GNU Emacs versions and release dates. See files NEWS.26, NEWS.25, NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, and NEWS.1-17 for changes in older Emacs versions. You can narrow news to a specific version by calling 'view-emacs-news' with a prefix argument or by typing C-u C-h C-n. Temporary note: +++ indicates that all necessary documentation updates are complete. (This means all relevant manuals in doc/ AND lisp doc-strings.) --- means no change in the manuals is needed. When you add a new item, use the appropriate mark if you are sure it applies, * Installation Changes in Emacs 27.1 * Startup Changes in Emacs 27.1 * Changes in Emacs 27.1 --- ** The new option 'tooltip-resize-echo-area' avoids truncating tooltip text on GUI frames when tooltips are displayed in the echo area. Instead, it resizes the echo area as needed to accommodate the full tool-tip text. +++ ** New function 'logcount' calculates an integer's Hamming weight. * Editing Changes in Emacs 27.1 --- ** New variable 'x-wait-for-event-timeout'. This controls how long Emacs will wait for updates to the graphical state to take effect (making a frame visible, for example). +++ ** The new user option 'electric-quote-replace-double' controls whether '"' is also replaced in 'electric-quote-mode'. If non-nil, '"' is replaced by a double typographic quote. * Changes in Specialized Modes and Packages in Emacs 27.1 ** Dired +++ *** The new user option 'dired-create-destination-dirs' controls whether 'dired-do-copy' and 'dired-rename-file' should create non-existent directories in the destination. ** Edebug +++ *** The runtime behavior of Edebug's instrumentation can be changed using the new variable 'edebug-behavior-alist' and the new abnormal hooks 'edebug-after-instrumentation-functions' and 'edebug-new-definition-functions'. Edebug's behavior can be changed globally or for individual definitions. ** Enhanced xterm support *** New variable 'xterm-set-window-title' controls whether Emacs sets the XTerm window title. This feature is experimental and is disabled by default. * New Modes and Packages in Emacs 27.1 * Incompatible Lisp Changes in Emacs 27.1 ** The FILENAME argument to 'file-name-base' is now mandatory and no longer defaults to 'buffer-file-name'. --- ** The function 'eldoc-message' now accepts a single argument. Programs that called it with multiple arguments before should pass them through 'format' first. Even that is discouraged: for ElDoc support, you should set 'eldoc-documentation-function' instead of calling 'eldoc-message' directly. * Lisp Changes in Emacs 27.1 --- ** The 'file-system-info' function is now available on all platforms. instead of just Microsoft platforms. This fixes a 'get-free-disk-space' bug on OS X 10.8 and later (Bug#28639). --- ** The function 'get-free-disk-space' returns now a non-nil value for remote systems, which support this check. * Changes in Emacs 27.1 on Non-Free Operating Systems ---------------------------------------------------------------------- This file is part of GNU Emacs. GNU Emacs 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. GNU Emacs 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 GNU Emacs. If not, see . Local variables: coding: utf-8 mode: outline paragraph-separate: "[ ]*$" end: