guardInputs() replaces guardFiles() in selection and fingerprints: the
files named in the guard, the GUARD_INPUTS a wrapper declares (read
statically — the wrappers run on import), and the closure of imports and
path literals of every guard file, stopping at src/** which stays the
patch side. A diff that touches the registry itself selects every added or
changed definition against the base registry read from git. Five mutants
guard the manifest and this selection.
Issue: #492
User-Visible: no
