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nil LIMIT argument to vc-print-log-internal.

(Search Throttle, Semanticdb Roots, Include paths, Idle Scheduler):
Numerous copyedits.

* cedet/semantic.el: Enable idle-mode menu items only if
global-semantic-idle-scheduler-mode is enabled.
(semantic-default-submodes): Doc fix.

* cedet/semantic/idle.el (global-semantic-idle-scheduler-mode):
When turning off, disable other idle modes.

`calc-twos-complement-mode'.
(math-format-number-fancy): Let `calc-twos-complement-mode' be nil.

`calc-twos-complement-mode'.

(calc-radix): Rename `calc-complement-signed-mode' to
`calc-twos-complement-mode'.
(calc-octal-radix, calc-hex-radix): Add an argument for two's complement.

`calc-twos-complement-mode'.
(math-format-number): Rename `math-format-complement-signed' to
`math-format-twos-complement'.

(latex-string-prefix-p, latex-complete-bibtex-keys, latex-complete-data)
(latex-complete-envnames, latex-complete-refkeys): New functions.
(latex-complete, latex-indent-or-complete): New commands.

(display-buffer): Obey it.
* minibuffer.el (minibuffer-completion-help): Use it.

(file-cache-delete-file-regexp): Use push.
(file-cache-complete): Use completion-in-region.

(htmlfontify-load-rgb-file): Remove unnused var `ff'.
Use with-current-buffer and string-to-number.
(hfy-fallback-colour-values): Use assoc-string.
* htmlfontify.el (hfy-face-to-css): Remove unused var `style'.
(hfy-face-at): Remove unused var `found-face'.
(hfy-compile-stylesheet): Remove unused var `css'.
(hfy-fontify-buffer): Remove unused vars `in-style', `invis-button',
and `orig-buffer'.
(hfy-buffer, hfy-copy-and-fontify-file, hfy-parse-tags-buffer):
Use with-current-buffer.
(hfy-text-p): Use expand-file-name and fewer setq.

completion when point was at the beginning of the buffer.

(completion--insert-strings): Implement vertical format.

* progmodes/grep.el (rgrep): Require `find-dired' for `find-name-arg'.

(mail-signature): Change default to t.
(mail-from-style): Deprecate `system-default' value.
(mail-insert-from-field): For default value of mail-from-style,
default to `angles' unless `angles' needs quoting and `parens'
does not.
(mail-citation-prefix-regexp): Use citation regexp from
message-mode.

(message-cite-prefix-regexp, message-sendmail-envelope-from)
(message-yank-prefix, message-indentation-spaces, message-signature)
(message-signature-file, message-default-headers): For GNU Emacs, set
default values from the corresponding mail-* variables.
(message-send-mail-with-sendmail): Use envelope-from only if
mail-specify-envelope-from is non-nil.