How to insert a value in the penultimate row of a range?

Question

bash

Hi
there is a file:

[/text0]
text1 = text2
* =
[/text3]
text4 = text5
* =

Need to insert 'text n = text n' before '* =' but after '[/text0]
How can this be done?

Answer 1

Based on the material presented in the answers to this question, I propose this option:
The file will turn into

[/text0]
text1 = text2
textN = textN
* =
[/text3]
text4 = text5
* =

PS: perhaps there is a more concise version