How do you use a macro to remove consecutive duplicate lines?

Q: How do you use a macro to remove consecutive duplicate lines?

`qayy:+1\nif getline('.')==@0|d|else|+1|endif\nq` Record a macro that yanks the current line and compares it with the next. If identical, delete the duplicate. Advanced use of Vim expressions.

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`qayy:+1
if getline('.')==@0|d|else|+1|endif
q` Record a macro that yanks the current line and compares it with the next. If identical, delete the duplicate. Advanced use of Vim expressions.

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Explanation

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