Fix typo in config docs for --extend-exclude (#3170)

The old regex in the example was invalid and caused an error on startup.

diff --git a/docs/usage_and_configuration/the_basics.md b/docs/usage_and_configuration/the_basics.md
index 7f76c57d3e622d48cd4b021fce25e9e02353c115..4c358742674390e33834b64f8f2fb9db4d0d8941 100644 (file)
--- a/docs/usage_and_configuration/the_basics.md
+++ b/docs/usage_and_configuration/the_basics.md
@@ -265,7 +265,7 @@ extend-exclude = '''
 # in the root of the project.
 (
   ^/foo.py    # exclude a file named foo.py in the root of the project
 # in the root of the project.
 (
   ^/foo.py    # exclude a file named foo.py in the root of the project

-  | *_pb2.py  # exclude autogenerated Protocol Buffer files anywhere in the project
+  | .*_pb2.py  # exclude autogenerated Protocol Buffer files anywhere in the project

 )
 '''
 ```
 )
 '''
 ```