(copy_text): Adjusted for the change of CHAR_STRING.

(copy_text): Adjusted for the change of CHAR_STRING.
(insert_char): Likewise.
(insert): Call update_compositions.
(insert_and_inherit): Likewise.
(insert_before_markers): Likewise.
(insert_before_markers_and_inherit): Likewise.
(insert_from_string): Likewise.
(insert_from_string_before_markers): Likewise.
(insert_from_buffer): Likewise.
(replace_range): Likewise.
(count_combining_composition): Deleted.
(count_combining_before): Delete codes for a composite character.
(count_combining_after): Likewise.
(del_range_1): Call update_compositions.
(del_range_byte): Likewise.
(del_range_both): Likewise.
(Fcombine_after_change_execute): Likewise.