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if we cannot preserve the actual position of it.
Make it static.  New arg WHOLE; callers changed.

newlines and backslashes in help strings.

by putting point at a place that won't force recentering.

Don't find any minibuffer window
except the one that is currently in use.

(Fdisplay_buffer): Use them, instead of doing the work here.
(syms_of_window): Defsubr them.

(coordinates_in_window): Use WINDOW_LEFT_MARGIN, WINDOW_RIGHT_MARGIN,
and WINDOW_RIGHT_EDGE.  Adjust for left-side scroll bar margin.
(window_loop, Fdisplay_buffer): Use new WINDOW_FULL_WIDTH_P macro.
(window_internal_width): Window width now always includes the
scroll bar, if any.  Use WINDOW_RIGHTMOST_P and WINDOW_FULL_WIDTH_P.

(set_window_height, set_window_width, Fset_window_buffer)
(change_window_height, window_scroll, Fset_window_configuration):
Clear last_overlay_modified field.
(Fpos_visible_in_window_p): Test last_overlay_modified field.

(Fset_window_buffer): Set last_selected_window slot.
(Fselect_window): Set last_selected_window slot.
(delete_all_subwindows): Maybe call unshow_buffer.

no special handling for scroll bars.

placeholder member is EMACS_INT, not int.

`x_set_menu_bar_lines' on MSDOS as well.

the window-scroll-functions.
(Fset_window_buffer_unwind): New function.
(window_initialized): New variable.
(init_window_once): Set it.

window, even temporarily; that has undesirable side effects.

Fscroll_up, Fscroll_down, Fscroll_other_window, Fscroll_left,
Fscroll_right, Frecenter, Fwindow_configuration_p): Harmonize arguments
with documentation.

window if it is still live.

Like Freplace_buffer_in_windows but really does all frames.

(display_buffer_1): New subroutine.

(Fset_window_redisplay_end_trigger): Likewise.
(syms_of_window): defsubr them.

Use HAVE_WINDOW_SYSTEM instead of testing for specific window systems.