[Wannier] projections vs. spinor_projections blocks

[Dominik Gresch]

Dear Wannier90 community,

I have a question regarding the use of the "projections" and 
"spinor_projections" blocks:

In chapter 3.2 of the user guide, the "projections" block is used to 
define spinor projections. However, in 5.1.6, the same input is 
described as the "spinor_projections" block.

A quick search in the code revealed that in parameters.F90, only 
"projections" is used, but not "spinor_projections". On the other hand, 
kmesh.F90 writes the "spinor_projections" block, and the it seems that 
pw2wannier90 reads it.

So my question is this: What is the exact difference in using 
"spinor_projections" or "projections"? Can they be used interchangeably, 
or should it always be "spinor_projections" when the spin part is set? 
If the two are equivalent, what is the preferred method?

Best regards,

Dominik Gresch