glyph_string_containing_background_width 30742 src/xdisp.c          s = glyph_string_containing_background_width (tail);
glyph_string_containing_background_width 30899 src/xdisp.c          tail = glyph_string_containing_background_width (tail);
glyph_string_containing_background_width 30901 src/xdisp.c    	clip_tail = glyph_string_containing_background_width (clip_tail);