To package authors & users:

Those of you who are using Coverage & Coveralls should be prepared for some 
large changes to your coverage statistics. Until now, the mechanisms we've 
been using to count coverage percentage were pretty badly broken; while we're 
still far from perfect, some recent changes in the Coverage package appear to 
have made those measurements considerably more accurate. In most cases, you'll 
see your coverage percentages drop, in some cases by a large amount. Those 
changes to Coverage were just merged and tagged, so the next time you push a 
commit, your numbers may plummet. Unless, of course, you're simply awesome 
about writing tests, or plan to become so :-).

References:
https://groups.google.com/d/msg/julia-dev/NFVvSQvd-Dk/Nyr8IXGQaTIJ
How to use Coverage to measure your coverage percentage, and find those 
functions in your package that need testing:
https://github.com/IainNZ/Coverage.jl

Best,
--Tim

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