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new macros in dispextern.h, frame.h and window.h.
(mode_line_string): No need to adjust width for mode lines, as it
is already adjusted by the caller.
(marginal_area_string): Handle fringes inside/outside margins.

window_part instead of int in arg list.  Users changed.

SCHARS, SBYTES, STRING_INTERVALS, SREF, SDATA; explicit size_byte references
left unchanged for now.

lisp/ChangeLog, and src/ChangeLog for list of changes.

case of writing a whole row, more or less analogous to the case of
writing only parts of a row.

mark_window_display_accurate.

Fix typos in comments.

Comment fix. Use renamed symbols.

position comparison.

(Fframe_or_buffer_changed_p): Likewise.
(Finternal_show_cursor_p): Likewise.
(syms_of_display): Likewise.

ring-bell-function.  Suggested by Alf-Ivar Holm <alfh@ifi.uio.no>

handling of windows which aren't full-width, fix handling
of marginal areas.

(line_hash_code, row_equal_p, fake_current_matrices)
(build_frame_matrix_from_leaf_window, update_frame_line)
(update_frame_line, update_frame_line, update_frame_line):
Don't use `inverse_p' field.

functions.
(allocate_matrices_for_window_redisplay)
(allocate_matrices_for_frame_redisplay: Use them.  Remove
parameters CH_DIM.

finding glyph row containing cursor when cursor_in_echo_area
is >= 0.

stop_charpos to something in front of its current position.

before insering/writing glyphs.

windows whose height has changed, disable partially visible
lines.