pb2gentest: Add blank line before new entries in special comments that are printed to output.
A "new entry" is defined by the string "Bug#" or "WL#" in the beginning of a comment line.
With properly formatted comments, this will result in output like:
# Bug#1234 - Some bug title
# Disabled: SQL this and that disabled
# WL#4321 - Some worklog title
# Disabled: New feature, worklog not pushed yet
etc.