The default copyright configuration values in the README appear to have extra characters at the end left over from copying the values from the code. I believe the correct example default values should be
one_date_re: ' Copyright \(c\) (?P<year>[0-9]{4})'
two_date_re: ' Copyright \(c\) (?P<from>[0-9]{4})-(?P<to>[0-9]{4})'
one_date_format: ' Copyright (c) {year}'
two_date_format: ' Copyright (c) {from}-{to}'
license_file: LICENSE
The default copyright configuration values in the README appear to have extra characters at the end left over from copying the values from the code. I believe the correct example default values should be