* src/editfns.c (styled_format): Refactor internally, mostly by
moving declarations closer to uses.  This should not affect behavior.
* test/automated/textprop-tests.el (textprop-tests-format): New test.

This removes the need for GCPRO1 etc.  Suggested by Stefan Monnier in:
http://lists.gnu.org/archive/html/emacs-devel/2015-08/msg00918.html
* doc/lispref/internals.texi (Writing Emacs Primitives):
* etc/NEWS:
Document the change.
* src/alloc.c (gcprolist, dump_zombies, MAX_ZOMBIES, zombies)
(nzombies, ngcs, avg_zombies, max_live, max_zombies, avg_live)
(Fgc_status, check_gcpros, relocatable_string_data_p, gc-precise):
* src/bytecode.c (mark_byte_stack) [BYTE_MARK_STACK]:
* src/eval.c (gcpro_level) [DEBUG_GCPRO]:
* src/lisp.h (struct handler.gcpro, struct gcpro, GC_MARK_STACK)
(GC_USE_GCPROS_AS_BEFORE, GC_MAKE_GCPROS_NOOPS)
(GC_MARK_STACK_CHECK_GCPROS, GC_USE_GCPROS_CHECK_ZOMBIES)
(BYTE_MARK_STACK, GCPRO1, GCPRO2, GCPRO3, GCPRO4, GCPRO5, GCPRO6)
(GCPRO7, UNGCPRO, RETURN_UNGCPRO):
Remove.  All uses removed.  The code now assumes
GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
* src/bytecode.c (relocate_byte_stack):
Rename from unmark_byte_stack, since it now only relocates.
All callers changed.
* src/frame.c (make_frame): Add an IF_LINT to pacify GCC 5.2
with GCPROs removed.
* src/systime.h: Use EMACS_LISP_H as the canary instead of GCPRO1.
* test/automated/finalizer-tests.el (finalizer-basic)
(finalizer-circular-reference, finalizer-cross-reference)
(finalizer-error):
* test/automated/generator-tests.el (cps-test-iter-close-finalizer):
Remove tests, as they depend on gc-precise.

Use the new `seq-into-sequence' in seqs passed to `seq-concatenate' to
ensure that concatenation happens on sequences only.  This makes it
possible to use `seq-concatenate' for new types of seqs.

* lisp/emacs-lisp/seq.el (seq-into-sequence, seq-concatenate): New
function used in `seq-concatenate'.
* test/automated/seq-tests.el (test-seq-into-sequence): New unit test
for seq-into-sequence.

* lisp/cedet/mode-local.el (xref-mode-local--override-present,
xref-mode-local-overload): New; add mode local overrides to
xref-find-definitions.

* test/automated/elisp-mode-tests.el: Add mode local override tests.
(xref-elisp-test-run): Handle indented defuns.
(xref-elisp-generic-*): Improve doc strings.

* lisp/progmodes/elisp-mode.el (elisp-xref-find-def-functions): New.
(elisp--xref-find-definitions): Use it.

New defconsts.
(tramp-do-file-attributes-with-stat)
(tramp-do-directory-files-and-attributes-with-stat): Use them.
(tramp-convert-file-attributes): Remove double slashes in symlinks.

* test/automated/tramp-tests.el (tramp-test18-file-attributes):
Handle symlinks with "//" in the file name.

Fixes: debbugs:21086

* lisp/progmodes/python.el (python-shell-buffer-substring):
Respect current line indentation when calculating string.

* test/automated/python-tests.el
(python-shell-buffer-substring-10)
(python-shell-buffer-substring-11)
(python-shell-buffer-substring-12): New tests.

* lisp/emacs-lisp/seq.el: Define seq.el functions using cl-defmethod to
make it easier to extend seq.el with new "seq types".
* test/automated/seq-tests.el (test-setf-seq-elt): New test.
* lisp/emacs-lisp/cl-extra.el (cl-subseq): Move back the definition of
subseq in cl-extra.el, and use it in seq.el.

* lisp/progmodes/python.el
(python-shell-tramp-refresh-process-environment): New function.
(python-shell-with-environment): Use it.

* test/automated/python-tests.el (python-shell-with-environment-2): Update.

* lisp/progmodes/python.el (python-shell-process-environment)
(python-shell-extra-pythonpaths, python-shell-exec-path)
(python-shell-virtualenv-root): Update docstring.  Remove :safe.
(python-shell-setup-codes): Remove :safe.
(python-shell-remote-exec-path): New defcustom.
(python-shell--add-to-path-with-priority): New macro.
(python-shell-calculate-pythonpath): Give priority to
python-shell-extra-pythonpaths.  Update docstring.
(python-shell-calculate-process-environment): Give priority to
python-shell-process-environment.  Update docstring.
(python-shell-calculate-exec-path): Give priority to
python-shell-exec-path and calculated virtualenv bin directory.
Update docstring.
(python-shell-tramp-refresh-remote-path): New function.
(python-shell-with-environment): Use it when working remotely and
do not modify tramp-remote-path.  Allow nesting.
(python-shell-calculate-command): Remove useless
python-shell-with-environment call.

* test/automated/python-tests.el (python-shell-calculate-pythonpath-1)
(python-shell-calculate-pythonpath-2)
(python-shell-calculate-process-environment-6)
(python-shell-calculate-process-environment-7)
(python-shell-calculate-process-environment-8)
(python-shell-calculate-exec-path-3)
(python-shell-calculate-exec-path-4)
(python-shell-calculate-exec-path-5)
(python-shell-calculate-exec-path-6)
(python-shell-with-environment-3): New tests.
(python-shell-calculate-process-environment-2)
(python-shell-calculate-process-environment-3)
(python-shell-calculate-process-environment-4)
(python-shell-calculate-process-environment-5)
(python-shell-calculate-exec-path-1)
(python-shell-calculate-exec-path-2)
(python-shell-with-environment-1)
(python-shell-with-environment-2): Update and simplify.

(smie-indent-exps, smie-indent-keyword): Use it.

* test/indent/css-mode.css: Test alignment with leading comment.