Merge pull request #230 from jon-freed/master

[about-version-control.asc] change "checkout" to "clone"

Author: ben

book/01-introduction/sections/about-version-control.asc

@@ -53,7 +53,7 @@ Local VCS systems suffer from this same problem – whenever you have the entire
 This is where Distributed Version Control Systems (DVCSs) step in.
 In a DVCS (such as Git, Mercurial, Bazaar or Darcs), clients don't just check out the latest snapshot of the files: they fully mirror the repository.
 Thus if any server dies, and these systems were collaborating via it, any of the client repositories can be copied back up to the server to restore it.
-Every checkout is really a full backup of all the data.
+Every clone is really a full backup of all the data.
 
 .Distributed version control.
 image::images/distributed.png[Distributed version control diagram]