define-generic-mode multiline regexp for highlighting not work if edit highlighted text.

[Oleksandr Gavenko]

dict -c5 source file format:

FILE is formatted with headwords preceded by 5 or more underscore
characters (_) and a blank line.

I write:

(define-generic-mode
  'dict-c5-mode
  nil
  nil
  '(
    ("^\\(_____+\\)

\\([^[:blank:]].*\\)$" (1 font-lock-function-name-face) (2 
font-lock-keyword-face))
    )
  '("\\.c5$" "\\.dict-c5$")
  nil
  nil
  )

If open file or M-x revert-buffer then all highlighted correctly.

If I edit highlighted text (add underscores to 'first 5' or chars to
'headword' or delete chars from 'headword') highlighting disappier.

--
Best regards!