class SimpleCov::Formatter::Base

project's `coverage/` directory).
somewhere else (handy for tests that don't want to clobber the
pipeline keeps working unchanged. Pass it explicitly to write
`output_dir` defaults to `SimpleCov.coverage_path` so the at_exit

def initialize(silent: false, output_dir: nil)
  @silent = silent
  @output_dir = output_dir
end