scripts: Reverted -o/-O to include all by-fields by default

For the same reason we output all field fields by default: Because
machines can process more information than humans can.

Worst case, by fields can still be limited via explicit -b/--by flags.

scripts/code.py

@@ -1029,10 +1029,13 @@ def main(obj_paths, *,
         **args):
     # figure out what fields we're interested in
     if by is None:
-        by = ['function']
+        if args.get('output') or args.get('output_json'):
+            by = CodeResult._by
+        else:
+            by = ['function']
 
     if fields is None:
-        fields = ['size']
+        fields = CodeResult._fields
 
     # find sizes
     if not args.get('use', None):