cae52845 ; Add 2023 to copyright years.
b3943592 Improve documentation of 'isearch-open-overlay-temporary'
ab3210e7 Document 'use-package' in the 2 main manuals

# Conflicts:
#	etc/refcards/ru-refcard.tex
#	lib/explicit_bzero.c
#	m4/explicit_bzero.m4