WFF-PERMUTE : WFFOP

WFF-PERMUTE is a wff operation.
Permute the two components of an infix operator:
A op B --> B op A.
 
The calling scheme for WFF-PERMUTE is:

(WFF-PERMUTE GWFF)
"GWFF"


The result is of type GWFF.

The arguments have the following meaning:
GWFF : Wff

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