Upon updating to 1.16.0 and attempting to include the new SingleSpaceSeparator check, eclipse throws the following error:
cannot initialize module SingleSpaceSeparator - Unable to instantiate 'SingleSpaceSeparator' class, ...
My guess is that this is because this file doesn't include the whitespace package
Issue #385: Cannot initialize module SingleSpaceSeparator
failed to reproduce, but code is updated, released as 1.16.1.