Merge from origin/emacs-26

Merge from origin/emacs-26

8fbe462 (origin/emacs-26) ; * doc/lispref/positions.texi (List Motion...
1d9efc0 Add index for "\( in strings" (Bug#25195)
304e96f Fix doc-string of 'fit-window-to-buffer' (Bug#36848)
d4c4987 Update view-mode docstring
d6ca1fc ; * lisp/term.el: Add missing / to esc seq commentary.
b3e2073 Fix subproc listening when setting filter to non-t (Bug#36591)
f671950 * etc/NEWS.25: Belatedly announce rcirc-reconnect-delay.
7f42277 Mention term.el's \032 dir tracking in commentary (Bug#19524)
16a529e Remove upload functionality of package-x from the elisp manual
78e6c2a * etc/AUTHORS: Update.
086a56e Clarify Gravatar docs
0592467 * doc/lispref/display.texi (Defining Faces): Say a face can't...

# Conflicts:
#	doc/emacs/programs.texi
#	etc/AUTHORS
#	lisp/term.el