From: bors <bors@rust-lang.org>
Date: Sat, 25 Feb 2017 07:32:31 +0000 (+0000)
Subject: Auto merge of #3742 - matklad:sets-are-monoid, r=alexcrichton
X-Git-Tag: archive/raspbian/0.35.0-2+rpi1~3^2^2^2^2^2^2^2~22^2~9^2~130
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=163de44297b052c8c8668f75a51029b6ed8a0416;p=cargo.git

Auto merge of #3742 - matklad:sets-are-monoid, r=alexcrichton

Simplify feature-handling code

A neat (imo :) ) hack to use an empty `&HashSet` instead of `Option<&HashSet>`.
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163de44297b052c8c8668f75a51029b6ed8a0416