find-file-of-tag to avoid name space pollution.
(tag-find-file-of-tag-noselect): Likewise.
(etags-list-tags, etags-tags-apropos): Use
tag-find-file-of-tag instead of find-file-of-tag.
(snarf-tag-function): Doc string is changed. Explained about new optional
argument, `use-explicit'.
(etags-snarf-tag): Added one optional argument `use-explicit'.
(file-of-tag-function): Doc string is changed. Explained about new optional
argument, `relative'.
(file-of-tag): Doc string is changed. Explained about new optional argument,
`relative'. Pass `relative' to `file-of-tag-function'.
(etags-file-of-tag): Added new argument `relative`.
(list-tags): Set `buffer-read-only' to t after making the major mode
apropos-mode.
(etags-list-tags): Used `make-text-button' instead of `add-text-properties'.
Used `snarf-tag-function', `goto-tag-location-function' and `find-file-of-tag'
instead of `find-tag-other-window' (it's too simple).
(find-tag-in-order): Used `find-file-of-tag-noselect' instead of `find-file'.
(etags-tags-apropos): Used `find-file-of-tag-noselect' instead of `find-file'.
Do not use `etags-goto-tag-location` directly; use `goto-tag-location-function'
instead. Print relative file paths instead of complete ones in *Tags List*
buffer, so lines in the buffer become shorter.
(etags-tags-apropos-additional): Use `make-text-button' instead of
`add-text-properties'.
(etags-tags-apropos): Use make-text-button instead of add-text-properties. Use
snarf-tag-function and etags-goto-tag-location instead of find-tag-other-window
(it's too simple).
(Man-header-file-path): New option.
(Man-synopsis-regexp, Man-files-regexp, Man-include-regexp)
(Man-file-name-regexp, Man-normal-file-prefix-regexp, Man-header-regexp)
(Man-normal-file-regexp): New variables.
(Man-mode-map): Inherited from `button-buffer-map'. Don't define "\r" and
mouse-2 directly. These key are defined in `button-buffer-map'.
(Man-xref-man-page, Man-xref-header-file, Man-xref-normal-file): New buttons.
`Man-xref-man-page' comes from woman.el.
(man-follow-mouse): Removed.
(Man-fontify-manpage): Use `Man-highlight-references' instead of calling
`add-text-properties' directly.
(Man-highlight-references, Man-highlight-references0): New functions.
(Man-view-header-file): New function.
(asm-mode): Use them in indent-line-function.
Set tab-always-indent to nil to stay closer to previous tab behavior.
Set comment-add. Remove space at end of comment-add.
(asm-newline): Obsolete. Use newline-and-indent instead.
(asm-mode-map): Remove TAB binding.
(asm-code-level-empty-comment-pattern)
(asm-flush-left-empty-comment-pattern)
(asm-inline-empty-comment-pattern): Remove.
(asm-comment): Use newcomment functions instead.
(asm-colon): Don't tab if colon is not after a label.
(asm-line-matches, asm-pop-comment-level): Remove.
(asm-mode-map): Declare and init at the same time.
(asm-code-level-empty-comment-pattern)
(asm-flush-left-empty-comment-pattern)
(asm-inline-empty-comment-pattern): Use \s< so they do not depend
on asm-comment-char. Turn them into constants.
(asm-mode): Simplify.
(asm-line-matches): Remove unused arg.
(display-time-mail-face): Change :type and default to nil.
(display-time-mail-icon): Use pbm, not xbm.
(display-time-mail-string): New.
(display-time-string-forms): Use display-time-mail-string. Add
checks in display property.
