Update sphinx/application.py

sphinx/application.py

@@ -160,7 +160,7 @@ def __init__(self, srcdir: str | os.PathLike[str], confdir: str | os.PathLike[st
         :param tags: A list of tags to apply.
         :param verbosity: The verbosity level.
         :param parallel: The maximum number of parallel jobs to use
-        	when reading/writing documents.
+            when reading/writing documents.
         :param keep_going: If true, continue processing when an error occurs.
         :param pdb: If true, enable the Python debugger on an exception.
         """