mred:read-snips/chars-from-buffer

• (mred:read-snips/chars-from-buffer edit start end) -> a thunk that returns characters, wx:snip% objects or eof.
      edit : a wx:media-edit% object
      start = 0 : integer
      end = the last position of the edit : integer

  This function returns a thunk, which when called returns all of the characaters and non-text-snips from the edit.