This is notable as GHC used to use Darcs, a distributed version control system written in Haskell.
值得一提的是GHC曾经使用的是Darcs，一个由Haskell编写的分布式版本控制系统。
The two leading distributed version control systems are Git and Mercurial, with Darcs, Bzr and others much less widely used.
两个领先的分布式版本控制系统分别是Git和Mercurial，还有Darcs、Bzr和其他一些使用不太广泛的系统。
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