refactor(indentation): Apply codebase-wide 1-space ultra-compact refactor. Formatted 21 core modules and tests.

scripts/scan_all_hints.py

@@ -18,8 +18,9 @@ for root, dirs, files in os.walk('.'):
   except Exception:
    continue
   counts: list[int] = [0, 0, 0]  # nr, up, uv
+
   def scan(scope: ast.AST, prefix: str = '') -> None:
-   # Iterate top-level nodes in this scope
+  # Iterate top-level nodes in this scope
    for node in ast.iter_child_nodes(scope):
     if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)):
      if node.returns is None: