Rename all EntityManager variables to entityManager in SimpleJpaRepository.

[jeomxon]

In the current SimpleJpaRepository, most of the variable names for EntityManager were em.
Changing the variable name of this constructor parameter to em also looks good.

[quaff]

I think the name entityManager is better than em.

[jeomxon]

@quaff
But In SimpleJpaRepository, most of the variable names for EntityManager were em.
Is it good to change all em to entityManager?

[quaff]

@quaff But In SimpleJpaRepository, most of the variable names for EntityManager were em. Is it good to change all em to entityManager?

It's safe to rename private variable, and I prefer to rename all em to entityManager.

[jeomxon]

@quaff
I rename all EntityManager variables to entityManager in SimpleJpaRepository.
Thank you :)

[gregturn]

Thanks @jeomxon! Merged to main, backported to 3.1.x and 3.0.x.