vim-55/src/edit.c

8626 	    colnr_T	want_vcol;
8640 	    getvcol(curwin, &curwin->w_cursor, NULL, NULL, &want_vcol);
8642 	    want_vcol = (want_vcol / ts) * ts;
8644 	    /* delete characters until we are at or before want_vcol */
8645 	    while (vcol > want_vcol
8649 	    /* insert extra spaces until we are at want_vcol */
8650 	    while (vcol < want_vcol)
9376 	colnr_T		want_vcol, vcol;
9424 	getvcol(curwin, cursor, &want_vcol, NULL, NULL);
9431 	    if (vcol + i > want_vcol)
9454 	    while (vcol < want_vcol && *ptr == ' ')
9460 	    if (vcol > want_vcol)