Gem::BasicSpecification#lib_dirs_glob

# File tmp/rubies/ruby-3.4.1/lib/rubygems/basic_specification.rb, line 324
def lib_dirs_glob
  dirs = if raw_require_paths
    if raw_require_paths.size > 1
      "{#{raw_require_paths.join(",")}}"
    else
      raw_require_paths.first
    end
  else
    "lib" # default value for require_paths for bundler/inline
  end

  "#{full_gem_path}/#{dirs}"
end