old_contents: import sys
  
  collect_ignore = [
      "icebox-rr_graph-import.py",  # ImportError: No Module named 'icebox'
      "vlog/vlog_to_model.py",  # Can't be imported - Issue #61
      "vlog/vlog_to_pbtype.py",  # Can't be imported - Issue #61
  ]
  
new_contents: import sys
  
  collect_ignore = [
      "vlog/vlog_to_model.py",  # Can't be imported - Issue #61
      "vlog/vlog_to_pbtype.py",  # Can't be imported - Issue #61
  ]
  
subject: Remove icebox exclude.