A number of small script fixes/tweaks from usage

- Fixed prettyasserts.py parsing when '->' is in expr

- Made prettyasserts.py failures not crash (yay dynamic typing)

- Fixed the initial state of the emubd disk file to match the internal
  state in RAM

- Fixed true/false getting changed to True/False in test.py/bench.py
  defines

- Fixed accidental substring matching in plot.py's --by comparison

- Fixed a missed LFS_BLOCk_CYCLES in test_superblocks.toml that was
  missed

- Changed test.py/bench.py -v to only show commands being run

  Including the test output is still possible with test.py -v -O-, making
  the implicit inclusion redundant and noisy.

- Added license comments to bench_runner/test_runner

scripts/test.py

@@ -121,6 +121,8 @@ class TestCase:
                     else:
                         yield v_
             # or a literal value
+            elif isinstance(v, bool):
+                yield 'true' if v else 'false'
             else:
                 yield v
 
@@ -827,8 +829,6 @@ def run_stage(name, runner_, ids, stdout_, trace_, output_, **args):
                         stdout_.flush()
                     except BrokenPipeError:
                         pass
-                if args.get('verbose'):
-                    sys.stdout.write(line)
 
                 m = pattern.match(line)
                 if m: