Merge pull request #5216 from plotly/fix-black-exclude

Fix `black` `exclude` parameter in `pyproject.toml`

Author: gvwilson

pyproject.toml

@@ -70,8 +70,7 @@ line-length = 88
 target_version = ['py38', 'py39', 'py310', 'py311', 'py312']
 include = '\.pyi?$'
 exclude = '''
-
-(
+/(
       \.eggs         # exclude a few common directories in the
     | \.git          # root of the project
     | \.hg
@@ -85,7 +84,7 @@ exclude = '''
     | js
     | submodules
     | plotly/matplotlylib/mplexporter
-)
+)/
 '''
 
 [tool.jupyter-packaging.builder]