test: Fix comments in pretty-printed test. rs=burningtree
test: xfail-pretty some benchmarks. rs=burningtree
etc: Add a suppression for more enum instruction scheduling botches. rs=burningtree
test: Residual de-muting of the test suite. rs=demuting
test: De-~mut the test suite. rs=demuting
Revert "test: De-~mut the test suite. rs=demuting"

This reverts commit f63efdc2100ff28e2a42600641835e7bd8bde591.