How to replace part of a text file between markers with another text file?

-------------------------------------------------------------------------------
Become or hire the top 3% of the developers on Toptal https://topt.al/25cXVn
-------------------------------------------------------------------------------

Music by Eric Matyas
https://www.soundimage.org
Track title: Switch On Looping

--

Chapters
00:00 Question
00:33 Accepted answer (Score 7)
00:45 Answer 2 (Score 44)
00:57 Answer 3 (Score 5)
01:29 Answer 4 (Score 4)
01:59 Thank you

--

Full question
https://superuser.com/questions/440013/h...

--

Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

--

Tags
#bash #unix #shellscript #textfiles #textprocessors

#avk47