Merge from origin/emacs-26
63b04c11d5 Fix copyright years by hand
5c7dd8a783 Update copyright year to 2018
220a9ecba1 Merge from Gnulib
312c565566 Don't add empty keyboard macro to macro ring (Bug#24992)
39ca289a7a Allow customization of decoding of "man" command
f8240815ea * etc/NEWS: Add security consideration note on passphrase ...
0c78822c70 Fix subtle problem with scroll-down when scroll-margin is ...
acd289c5a4 Fix problems with indexing in User manual
b240c7846b * lisp/help.el (describe-key): Only (copy-sequence elt) wh...
e879a5444a * src/buffer.c (Frestore_buffer_modified_p): Fix bug#29846
81b1028b63 Improve documentation of 'inhibit-modification-hooks' and ...
7175496d7a Fix doc string of 'enable-recursive-minibuffers'
5b38406491 Fix documentation of delsel and of killing text
# Conflicts:
# etc/NEWS
# etc/refcards/ru-refcard.tex