abbreviator

n. one who abbreviates, one who shortens, summarizer

Abbreviator, plural Abbreviators in English or Abbreviatores in Latin, also called Breviators, were a body of writers in the papal chancery, whose business was to sketch out and prepare in due form the pope's bulls, briefs and consistorial decrees before these are written out in extenso by the scriptores.
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Noun
1. one who shortens or abridges or condenses a written work
(synonym) abridger
(hypernym) redact, redactor, reviser, rewriter, rewrite man
(derivation) abridge, foreshorten, abbreviate, shorten, cut, contract, reduce

(n.)
One who abbreviates or shortens.
  

(n.)
One of a college of seventy-two officers of the papal court whose duty is to make a short minute of a decision on a petition, or reply of the pope to a letter, and afterwards expand the minute into official form.
  

N M
summerizer; one who makes abstracts/epitomes from papal bulls