BUF_UNCHANGED_MODIFIED  613 src/buffer.c     BUF_UNCHANGED_MODIFIED (b) = 1;
BUF_UNCHANGED_MODIFIED  153 src/buffer.h     BUF_UNCHANGED_MODIFIED (current_buffer)
BUF_UNCHANGED_MODIFIED  970 src/buffer.h     if (BUF_UNCHANGED_MODIFIED (buf) == BUF_MODIFF (buf)
BUF_UNCHANGED_MODIFIED 17605 src/xdisp.c          BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b);