>
Provides support for fetching a specification file from a Mercurial source remote.
Supports all the options of the downloader (is similar to the git key of
source attribute of a specification).
fetch
description
fetch(sandbox) #=> undefined
249 def fetch(sandbox)
250   pre_download(sandbox)
251 end
description #=> undefined
255 def description
256   "from `#{params[:hg]}`".tap do |description|
257     description << ", revision `#{params[:revision]}`" if params[:revision]
258   end
259 end