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Eli Zaretskii authored
xdisp.c (set_cursor_from_row): Don't be fooled by truncated rows: don't treat them as having zero-width characters. Improve comments. (extend_face_to_end_of_line): Use window_box_width to compute the width of the stretch glyph, to account for margins. If this is the last glyph row, use DEFAULT_FACE_ID, to avoid painting the rest of the window with the region face.
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