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obsolete variable dired-free-space-program.  On Darwin, don't set
directory-free-space-program, shell-file-name and
process-connection-type; set directory-free-space-args to not
include `-P' and use utf-8 for file name coding system.

from shell command execution.

(readable_events): Call readable_filtered_events.
(get_filtered_input_pending): New function.
(get_input_pending): Call get_filtered_input_pending.
(Finput_pending_p): Call get_filtered_input_pending.

(x_detect_focus_change): New function.
(XTread_socket): Call x_detect_focus_change for FocusIn/FocusOut
EnterNotify and LeaveNotify to track X focus changes.

(derived-mode-class): Make it obsolete.

(mouse-wheel-up-button, mouse-wheel-down-button): Obsolete.
(mouse-wheel-up-event, mouse-wheel-down-event): New vars.
(mouse-wheel-follow-mouse): Change default to t.
(mwheel-event-button): Return the basic event symbol.
(mwheel-scroll): Work with non-mouse events.
(mouse-wheel-mode): Use the new vars.
(mwheel-install): Obey `uninstall'.

(mode_line_string_face_prop): New variables.
(store_mode_line_string): New function.
(display_mode_element): Use store_mode_line_string to
add mode-line string elements to mode_line_string_list
when mode_line_string_list is non-nil.
(Fformat_mode_line): Now returns propertized string by
default.  New arg NO-PROPS to ignore properties.
(decode_mode_spec): Only add two dashes for %- in propertized
mode-line string.
(syms_of_xdisp): Init and staticpro mode_line_string_list.

(describe-variable): Likewise.

(internal-get-face): Remove redundant info from docstring and
fix obsolescence declaration.

(make-local-hook): Likewise.
(baud-rate): Remove redundant info from docstring.

(meta-flag): Likewise.

(tramp-multi-file-name-hop-structure): Split for easier
readability.
(tramp-handle-make-symbolic-link): Use user/host/method/... from
LINKNAME, not FILENAME.
(tramp-handle-verify-visited-file-modtime): Call
tramp-ange-ftp-file-name-p with right parameters.
(tramp-handle-verify-visited-file-modtime): `insert' does not
work for integers, convert them to strings first.
(tramp-handle-ange-ftp): New function to perform setup for
replacing Ange-FTP with Tramp.
(tramp-repair-jka-compr): New function to factor out some
previously top-level code.  Call the function at top-level.