A A question from Superspace and 1001 lessons

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My question is about Eq. (3.8.12) on page 112 of this text:
https://arxiv.org/pdf/hep-th/0108200
I believe that ##f'(\Phi(z))=\frac{df(\Phi(z))}{dz}##, I get confused with the prime in ##z'## and is it really just this derivative?
I wonder how many people read this 1983 book.
 

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