D_EXPANDTABS
dflags |= D_EXPANDTABS;
if (c == '\t' && (flags & D_EXPANDTABS)) {
dflags |= D_EXPANDTABS;
if (c == '\t' && (flags & D_EXPANDTABS)) {
if (c == '\t' && (flags & D_EXPANDTABS)) {
dflags |= D_EXPANDTABS;