[NFC][Py Reformat] Reformat python files in lldb

This is an ongoing series of commits that are reformatting our Python
code. Reformatting is done with `black` (23.1.0).

If you end up having problems merging this commit because you have made
changes to a python file, the best way to handle that is to run `git
checkout --ours <yourfile>` and then reformat it with black.

RFC: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style

Differential revision: https://reviews.llvm.org/D151460

Author: JDevlieghere

lldb/docs/_lldb/__init__.py

@@ -5,5 +5,5 @@
 # This package acts as a mock implementation of the native _lldb module so
 # that generating the LLDB documentation doesn't actually require building all
 # of LLDB.
-module_name = '_lldb'
+module_name = "_lldb"
 sys.modules[module_name] = Mock()