glyph_string_containing_background_width 30752 src/xdisp.c          s = glyph_string_containing_background_width (tail);
glyph_string_containing_background_width 30909 src/xdisp.c          tail = glyph_string_containing_background_width (tail);
glyph_string_containing_background_width 30911 src/xdisp.c    	clip_tail = glyph_string_containing_background_width (clip_tail);