Davin Pearson wrote:

> (set-text-properties (point-at-bol) (point-at-eol) '(read-only t))

FYI

  This function is obsolete since 29.1; use
  ‘line-beginning-position’ instead.

  This function is obsolete since 29.1; use
  ‘line-end-position’ instead.

--
underground experts united
https://dataswamp.org/~incal