doc: pidefterm -> deftech (#2956)

Use `deftech` for "structure subtype" so that Typed Racket can more
easily reference it
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Ben Greenman 2019-12-08 17:55:26 -05:00 committed by GitHub
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@ -27,7 +27,7 @@ associated with the structure type, and the corresponding arguments
are omitted from the constructor procedure. All automatic fields in a are omitted from the constructor procedure. All automatic fields in a
structure type follow the non-automatic fields. structure type follow the non-automatic fields.
A structure type can be created as a @pidefterm{structure subtype} of A structure type can be created as a @deftech{structure subtype} of
an existing base structure type. An instance of a structure subtype an existing base structure type. An instance of a structure subtype
can always be used as an instance of the base structure type, but the can always be used as an instance of the base structure type, but the
subtype gets its own predicate procedure, and it may have its own subtype gets its own predicate procedure, and it may have its own