Another fix for mu_pp_for_diff on machines with really wide addresses.
Fixed _run_suite's method filter to allow for method-only matches to work again.
Fixed filter to work with strings again.

[git-p4: depot-paths = "//src/minitest/dev/": change = 8163]
I don't know why this warning didn't come up during normal testing...
[git-p4: depot-paths = "//src/minitest/dev/": change = 8176]
! Removed the long deprecated assert_block
! Removed the long deprecated lifecycle hooks: add_(setup|teardown)_hook
! Removed ::reset_setup_teardown_hooks

[git-p4: depot-paths = "//src/minitest/dev/": change = 8177]