I understand that some operators have elementwise versions, when
  prefixed with a dot. I think the manual is missing some dots, like in
  this paragraph, right ?

"The operator < is intended for array objects; the operation A .< B is
valid only if A and B have the same dimensions. The operator returns an
array with boolean entries and with the same dimensions as A and B. Such
operators are called elementwise; Julia offers a suite of elementwise
operators: *, +, etc."

  Also, is there a true mechanism for elementwise'ing operators ? Or are
  those just a collection of built-ins following the same naming
  convention ?

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