Merge from origin/emacs-27

186152ba Pacify gcc -Wunused-function on Ubuntu 18.04.3
4cd143ad Fix copyright years by hand
365e01cc Update copyright year to 2020
cd2c1561 ; * etc/NEWS: Make the description of XDG fallback more ac...

# Conflicts:
#	etc/NEWS
#	etc/refcards/ru-refcard.tex
2 jobs for master in 82 minutes and 44 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Test
failed #4640
test-all

01:22:44

passed #4641
test-filenotify-gio

01:04:42

 
Name Stage Failure
failed
test-all Test
Makefile:319: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:294: recipe for target 'check-expensive' failed
make[1]: Leaving directory '/builds/emacs/emacs/test'
make[1]: *** [check-expensive] Error 2
Makefile:959: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1