Merge from origin/emacs-26

Merge from origin/emacs-26

fd35804971 (origin/emacs-26) * doc/lispref/strings.texi (Case Convers...
89e257d71b * doc/misc/speedbar.texi (Top): Fix grammar.
a31ab5ffb5 * lisp/subr.el (with-silent-modifications): Doc fixes.
2ebc8dc3b6 Fix curved quotes in printed manual
e4a881b5cf Say that "gnus-cloud" is a parody name
13c59d0a83 More improvements for text.texi
7850b7620e Adjudicate review comments for the "Text" chapter of user ...
d7d3b14a99 * lisp/url/url-http.el (url-http-wait-for-headers-change-f...
f3819ad13e In C-h k <mouse-n>, alert user to existence of any matchin...
99054fbef9 * net/eww.el (eww): Handle URLs without host part.
de89c0b641 Make C-h c/k S-mouse-1 display message for mouse-appearanc...
720ed0b533 Avoid crashes when ':eval' deletes our frame
9105c9aa34 Fix scrolling up in pixel-scroll.el
b882d4ef11 Fix problems with ligatures in PDF version of ELisp manual
289dd53bb3 (elisp-flymake-byte-compile): Handle killed buffer in sent...
cf36c82127 Avoid some overfull lines in PDF lispref
b07b56a351 Avoid some overfull lines in PDF manual
6b3118f025 * doc/emacs/arevert-xtra.texi (Auto Reverting the Buffer M...
7ffb7b1e01 ; lispref nil/t markup fixes

# Conflicts:
#	doc/emacs/text.texi