Merge from origin/emacs-25

Merge from origin/emacs-25

9ba51ed Document buffer-swap-text+save-excursion interaction
452aa94 Fix eieio vs cl-generic incompatibilities found in Rudel (bug...
248d5dd Include cl-generic in package--builtin-versions (bug#22817)
8f5a8b6 Improve timing in `tramp-test29-environment-variables'
05ba7a0 Add test for handling environment variables in Tramp
e393d4f * lisp/emacs-lisp/package.el (describe-package-1) (package-st...
5e38887 ; * lisp/net/tramp.el: Fix 2010-10-04 comment typo.  (Bug#23913)
90f2169 ; Spelling fixes
069fc05 Improve documentation of search functions
0a0144a Delete environment variables in Tramp when needed
f624671 Add "New in Emacs 25" section to the FAQ
658daf9 Fix 'vertical-motion' in non-interactive sessions
686b520 Fix memory leak in imagemagick-types
4069b71 Update ELisp manual to match 'string-collate-equalp' doc string
1b2d6a6 Clarify docstring of find-feature-regexp
aac62a6 Add details to cl-lib defining macros' docstrings
d6aa4da Clarify doc string of 'save-buffer'
03bcf11 Un-confuse doc string of 'string-collate-equalp'
c53135b Clarify documentation of 'mouse-on-link-p'

# Conflicts:
#	lisp/emacs-lisp/eieio-core.el