Auto merge of #3743 - jbendig:required_features_doc, r=alexcrichton
authorbors <bors@rust-lang.org>
Wed, 22 Feb 2017 01:56:06 +0000 (01:56 +0000)
committerbors <bors@rust-lang.org>
Wed, 22 Feb 2017 01:56:06 +0000 (01:56 +0000)
Improved required-features docs

This should make it more clear about what happens when not all of the required features are selected.


Trivial merge