Typespec for email_reply_to() seems not correct

[mradke]

coherence/lib/coherence/config.ex

Line 141 in 956b6b7

@spec email_reply_to() :: {nil, nil} | true | {String.t, String.t} | String.t

The typespec claims, the function email_reply_to() returns {nil, nil} | true | {String.t, String.t} | String.t, when in fact it returns nil | true | String.t, as far as I understand it.

This is probably not critical, just a minor annoyance in that it throws warnings at me while developing.