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Eli Zaretskii authored
src/xdisp.c (reseat): Don't look for prev_stop, as that could mean a very long run. (next_element_from_buffer): When iterator oversteps prev_pos backwards, don't search for a new prev_stop more than 1000 characters back. (handle_stop_backwards): Don't assume that CHARPOS is necessarily a stop_pos. (compute_display_string_pos): Check also BUF_OVERLAY_MODIFF for a match, when testing the cached display string position for applicability.
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