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Filesystem  blocks   quota   limit   grace   files ...
 /dev/hdd3   26320   46080   51200            1521 ...
 /dev/hdd4   26320           51200            1060 ...

# controlled search-and-replace to insert column markers
# using the header line as a guide to where the columns lie
...
  @_ = split /\s*\#\s*/;
  # @_ now has true columns ready for whitespace trimming
}