Add YAPF style + ignore, and format tracked Python files

cmdlet/__init__.py

@@ -7,7 +7,8 @@ from importlib import import_module as _import_module
 Cmdlet = Callable[[Any, Sequence[str], Dict[str, Any]], int]
 
 # Registry of command-name -> cmdlet function
-REGISTRY: Dict[str, Cmdlet] = {}
+REGISTRY: Dict[str,
+               Cmdlet] = {}
 
 
 def _normalize_cmd_name(name: str) -> str:
@@ -52,9 +53,8 @@ import os
 
 cmdlet_dir = os.path.dirname(__file__)
 for filename in os.listdir(cmdlet_dir):
-    if not (
-        filename.endswith(".py") and not filename.startswith("_") and filename != "__init__.py"
-    ):
+    if not (filename.endswith(".py") and not filename.startswith("_")
+            and filename != "__init__.py"):
         continue
 
     mod_name = filename[:-3]
@@ -82,7 +82,8 @@ except Exception:
     pass
 
 # Import root-level modules that also register cmdlet
-for _root_mod in ("select_cmdlet",):
+for _root_mod in ("select_cmdlet",
+                  ):
     try:
         _import_module(_root_mod)
     except Exception: