Merge pull request #9337 from dtrodrigues/python-downcase

pypi: downcase main package name

Library/Homebrew/utils/pypi.rb

@@ -231,7 +231,7 @@ module PyPI
     end
 
     # Remove extra packages that may be included in pipgrip output
-    exclude_list = %W[#{main_package.name} argparse pip setuptools wheel wsgiref].map { |p| Package.new p }
+    exclude_list = %W[#{main_package.name.downcase} argparse pip setuptools wheel wsgiref].map { |p| Package.new p }
     found_packages.delete_if { |package| exclude_list.include? package }
 
     new_resource_blocks = ""