doctest marks readme files without doctests as skipped.

[graingert]

Here's the issue, https://travis-ci.org/graingert/dockhand/jobs/134400724#L202

on these files: https://github.com/graingert/dockhand/tree/69be7c180e67407aca462b899ff1259b3e09f080

[RonnyPfannschmidt]

i think this is related to the stdlib doctest limits, i'm not sure how easy a fix is, i hope someone else will take a look

[graingert]

found the issue working on a fix now

[graingert]

it's a ∀ x: P(x) ↛ ∃ x: P(x) issue

[RonnyPfannschmidt]

can you explain that for a non-mathematican?

[graingert]

All does not imply exists