Pragma operators to be checked.

[sgtp]

One known issue: Pragma suppress only removes references and not triples

This is a bug where the pragma suppress directive doesn't remove statements from a code.
E.g.:
for a code with the form:
code/x-y

a pragma directive can expand the code to:

code/x
..
..
code/y

A suppress directive would then remove the code "code/x-y"
The code is removed from the register, but statements about the code are kept, and should instead be removed.

Note as this bug affects the terminology import pipeline only.