Of 1109 files in src/{ library, compiler }, calculate top committers
for each file according to git blame (i.e. number of lines the author
was the most recent committer to touch) and then count total top-3
appearances.

 756 extempore
 445 michelou
 436 odersky
 256 cunei
 216 prokopec
 123 dragos
 100 dubochet
  85 emir
  73 mihaylov
  61 spoon
  54 rytz
  50 kzys
  50 buraq
  45 moors
  44 washburn
  42 stepancheg
  26 zenger
  21 phaller
  19 mcdirmid
  15 schinz
  15 milessabin
  13 rompf
  10 plocinic