(make_buffer_string): Don't copy intervals
if we don't really have any properties. (Finsert_buffer_substring): Pass graft_intervals_into_buffer the current buffer. Pass it the extra arg LENGTH. (Fsubst_char_in_region): Call modify_region only if a change has to be made. Call signal_after_change just once, at end.
Showing with 19 additions and 7 deletions