chore: tidy codes

Signed-off-by: Jack Cherng <[email protected]>

boot.py

@@ -1,7 +1,7 @@
 def reload_plugin() -> None:
     import sys
 
-    # remove all previously loaded plugin modules.
+    # remove all previously loaded plugin modules
     prefix = f"{__package__}."
     for module_name in tuple(filter(lambda m: m.startswith(prefix) and m != __name__, sys.modules)):
         del sys.modules[module_name]