This worked for me: (attribute a title opstring) (def b...

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This worked for me:

  (attribute a          title          opstring)    
  (def byline (i)
    (pr " by ")
    (let u i!by
     (tag (a href (user-url u)
             title (string "karma: " (karma u) 
                           " | created: " (text-age:user-age u)))
          (pr u)))
    (pr " " (text-age:item-age i) " "))

I didn't really look into the performance cost of calling uvar for every byline; that's probably not ideal.