(handle_one_xevent): Check that f is not NULL before
calling x_kill_gs_process.
(add-to-history): Add KEEP-ALL arg and align functionality
with read-from-minibuffer.
(archive-arc-summarize, archive-lzh-summarize): Convert csize to integer when
computing offsets within the compressed archive file.
(auto-mode-alist): Add .lha files to archive file extensions.
(auto-coding-alist): Add .lha to files read with no-conversion.
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(ewoc-data): Add docstring.
(ewoc-nth): Doc fix.
(ewoc-map, ewoc-invalidate): Compute PP before looping.
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(ido-read-internal): Use only nondirectory part of default item.
(shell-dirtrack-mode): Make it into a proper minor mode, so
we can explicitly enable/disable rather than toggle.
(shell-mode): Use it.
(shell-cd): Don't try to reproduce what `cd' does.
(Regexp Special): Clarify nested regexp warning.
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(Minibuffer History): Clarify.
(display_tool_bar_line): Restore entire tool-bar geometry when
backtracking in case last image doesn't fit on line.

(display_tool_bar_line): Don't adjust tool-bar height by more than
height of one frame default line.  From: MIYOSHI Masanori.
(Diff Mode): Mention C-x `.
(Fprevious_overlay_change, Fnext_overlay_change): Doc fixes.
(display_tool_bar_line): Eliminate x_before variable.
(better_font_p): Any font beats no font.
(best_matching_font): Simplify based on above change.
Comment change.