ack-grep Easter eggs - what is the meaning of ack-grep --cathy?

Question

ack-grep has 3 easter eggs:

ack-grep --thppt
ack-grep --bar 
ack-grep --cathy

While I am a huge fan of ack-grep --bar and I get ack-grep --thppt, could anyone explain the joke behind ack-grep --cathy?

Answer 1

$ ack --cathy
                +-------------+
                |  CHOCOLATE! |
                |  CHOCOLATE! |
                |  CHOCOLATE! |
                |    AACK!    |
                +-------------+
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• Cathy was an American gag-a-day comic strip

• Ack-grep easter egg flags