Redef-
Turn off system hacker's redefinition command
Example and General Form:
ACL2 !>:redef-
ACL2 p!>
This macro, for system hackers only, is a convenient way to reverse the
effects of :redef+. See redef+. We do not guarantee that
:redef- will restore everything one might expect to its state before the
earlier :redef+. To see exactly what :redef- does, look at its
code, for example by evaluating :trans1 (redef-)