external linkage.
(edit_find_bracket): Likewise.
* edit/edit.c (edit_move_to_prev_col): Reflect the changes above.
(edit_find_bracket): Likewise.
* edit/editwidget.c (edit_event): When moving around with the mouse
use edit_move_down(), edit_move_up() and edit_move_to_prev_col()
instead of move_cursor() to update the cursor position since
the latter doesn't update some internal variables.
Use edit_find_bracket() to update the bracket pair highlighter
state.
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