Bug fix for advance users using the java properties for barcode separators (both sequences and qualities). Usign an special character as separator was not working before, and providing a regexp as introducing it into the barcode separator of output file. This fix corrects the issue and allows to properly use other separators as defaults (e.g., +) instead of the SAM-spec recommended hyphen (-).
Recommended to update if you are using the Dreadtools.barcode_index_delimiter and/or Dreadtools.barcode_quality_delimiter java properties. Otherwise, the fix does not affect the user.