* lisp/mpc.el (mpc-volume-mouse-set): Don't burp at the boundaries.
Auto-commit of loaddefs files.
* src/intervals.c: Tighten assertions.
(create_root_interval): Make sure the interval is not empty.
(intervals_equal): Use booleans.
(rotate_right, rotate_left): Check LENGTHs rather than TOTAL_LENGTH.
(balance_an_interval): Sanity check LENGTHs and TOTAL_LENGTHs.
(balance_possible_root_interval): Simplify and use booleans.
(split_interval_right, split_interval_left): Check LENGTH, and remove
now redundant assertion.
(adjust_intervals_for_insertion): Remove now redundant assertions.
(delete_node, interval_deletion_adjustment)
(adjust_intervals_for_deletion, merge_interval_right)
(merge_interval_left): Check LENGTH rather than TOTAL_LENGTH.
(reproduce_interval): Make sure the interval is not empty.
src/term.c (tty_menu_activate): A better initialization for cursor coordinates.
* configure.ac (LIBPNG): Consult libpng-config
for the precise form of "-lpng" to use.
Doc fixes

* doc/misc/autotype.texi (Skeleton Language):
* doc/misc/message.texi (Header Commands):
* lisp/allout-widgets.el (allout-widgets-tally)
(allout-decorate-item-guides):
* lisp/menu-bar.el (menu-bar-positive-p):
* lisp/minibuffer.el (completion-pcm-complete-word-inserts-delimiters):
* lisp/cedet/ede.el (ede-project-directories, ede-check-project-directory):
* lisp/cedet/semantic/ia-sb.el (semantic-ia-sb-show-doc):
* lisp/cedet/semantic/tag.el (semantic-tag-in-buffer-p):
* lisp/cedet/semantic/bovine/c.el (semantic-tag-abstract-p):
* lisp/gnus/gnus-registry.el (gnus-registry-install-p): Doc fix.
* lisp/progmodes/gdb-mi.el (gdbmi-same-start, gdbmi-is-number):
* lisp/progmodes/js.el (js--inside-param-list-p)
(js--inside-dojo-class-list-p, js--forward-destructuring-spec):
* lisp/progmodes/prolog.el (region-exists-p):
* lisp/progmodes/verilog-mode.el (verilog-scan-cache-ok-p):
* lisp/textmodes/reftex-parse.el (reftex-using-biblatex-p):
* lisp/url/url-parse.el (url-generic-parse-url):
* src/floatfns.c (Fisnan):
* src/profiler.c (Fprofiler_cpu_running_p):
Doc fixes (replace `iff').
* emacs-lisp/cl-macs.el (cl-deftype): Fix indentation.
Improve indexing in trouble-related sections of Emacs User manual.

 doc/emacs/trouble.texi (Lossage, DEL Does Not Delete, Stuck Recursive)
 (Screen Garbled, Text Garbled, After a Crash, Emergency Escape)
 (Bug Criteria, Understanding Bug Reporting, Checklist, Service):
 Improve indexing.
Extend todo item insertion UI to item editing.

* calendar/todo-mode.el: Reimplement item editing to have the same
basic user interface as item insertion, and make small UI and
larger internal improvements to the latter.
(todo-insert-item): Add reference to the Todo mode user manual to
the documentation string.
(todo-insert-item--basic): Rename from todo-basic-insert-item and
adjust all callers.  Change signature to combine diary and
nonmarking arguments.  Incorporate functionality of deleted item
copying command and add error checking.  Remove detailed
descriptions of the arguments from the documentation string, since
this is treated in the Todo mode user manual.
(todo-copy-item, todo-edit-multiline-item)
(todo-edit-done-item-comment, todo-edit-item-header)
(todo-edit-item-time, todo-edit-item-date-from-calendar)
(todo-edit-item-date-to-today, todo-edit-item-date-day-name)
(todo-edit-item-date-year, todo-edit-item-date-month)
(todo-edit-item-date-day, todo-edit-item-diary-nonmarking):
Remove.
(todo-edit-item): Reimplement as wrapper command for
todo-edit-item--next-key and make it distinguish done and not done
todo items.
(todo-edit-item--text): New function, replacing old command
todo-edit-item and incorporating deleted commands
todo-edit-multiline-item and todo-edit-done-item-comment.
(todo-edit-item--header): Rename from todo-basic-edit-item-header.
Use only numeric value of prefix argument.  Remove detailed
descriptions of the arguments from the documentation string, since
this is treated in the Todo mode user manual.
(todo-edit-item--diary-inclusion): New function, replacing old
command todo-edit-item-diary-inclusion and incorporating and fixing
functionality of deleted command todo-edit-item-diary-nonmarking,
making sure to remove todo-nondiary-marker when adding
diary-nonmarking-symbol.
(todo-edit-category-diary-inclusion): Make sure to delete
diary-nonmarking-symbol when adding todo-nondiary-marker.
(todo-edit-category-diary-nonmarking): Fix indentation.
(todo-insert-item--parameters): Group diary and nonmarking
parameters together.
(todo-insert-item--apply-args): Adjust to signature of
todo-insert-item--basic and incorporate copy parameter.
Make small code improvements.
(todo-insert-item--next-param): Improve prompt and adjust it to
new parameter grouping.  Remove obsolete code.
(todo-edit-item--param-key-alist)
(todo-edit-item--date-param-key-alist)
(todo-edit-done-item--param-key-alist): New defconsts.
(todo-edit-item--prompt): New variable.
(todo-edit-item--next-key): New function.
(todo-key-bindings-t): Bind "e" to todo-edit-item.  Remove
bindings of deleted commands.
Add a warning and a menu.

* calendar/todo-mode.el (todo-edit-file): Use display-warning.
(todo-menu): Uncomment and update.
Update, improve exposition, add cross references, fix typos.

* todo-mode.texi: Update, improve exposition, add cross
references, fix typos.
(Inserting New Items, Editing Item Headers and Text): Rewrite to
document new user interface.
Consult libpng-config more consistently.

* configure.ac (edit_cflags): Move this up and to the top level,
so that PNG_CFLAGS can use it too.
(PNG_CFLAGS): New var.
(png_longjmp): Use PNG_CFLAGS when checking.
(LIBPNG): Be consistent about -lpng16 etc; e.g., don't use -lpng16
in some places and -lpng in others.  Test libpng-config's exit
status.  If it succeeds, use its output rather than appending -lz -lm.
* src/Makefile.in (PNG_CFLAGS): New var.
(ALL_CFLAGS): Use it.
* src/image.c [HAVE_PNG]: Don't worry about <libpng/png.h>, as
CFLAGS now handles this.
admin/make-tarball.txt: Misc small updates/edits
* vhdl-mode.texi: Add "@documentencoding UTF-8",

since this is a toplevel .texi file.
* configure.ac (AC_CONFIG_MACRO_DIR): Use it.
Use pkg-config's pkg.m4

* configure.ac: Use pkg-config's pkg.m4, rather than reinventing it.
Add explicit AC_SUBST's where needed.

* autogen.sh (progs): Add pkg-config.
(pkg_config_min): New variable.

* INSTALL.REPO: Mention pkg-config.

* etc/PROBLEMS: Mention a related issue that can occur with a local automake.
Remove the --with-pkg-config-prog configure option

* configure.ac (--with-pkg-config-prog): Remove.
Use the PKG_CONFIG environment variable instead if you need it.

* etc/NEWS: Mention this.
* configure.ac (PKG_CONFIG_PATH): Declare with AC_ARG_VAR.
* lisp/vc/ediff-diff.el (ediff-set-fine-diff-properties-in-one-buffer):
Use nil rather than `default' for the "default" appearance.
* lisp/vc/ediff-util.el (ediff-inferior-compare-regions)
(ediff-toggle-autorefine, ediff-unselect-difference): Don't use
a misleading `default' value when it's really a boolean.
* lisp/vc/ediff-init.el (ediff-set-overlay-face): Don't set help-echo if the
overlay is not visible.
Make it easier on maintainers who use their own Automake.

* autogen.sh (ACLOCAL_PATH, AUTORECONF_ENV): New vars.
Set them to avoid problems when maintainers prepend their own
Automake installations to their PATH.  Report an error if pkg.m4
can't be found.