updating docker version command (#3058)

To get the output shown in the example, you need to run `docker --version` (`docker version` gives  you the long form version output)
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Victoria Bialas 2017-04-25 15:07:19 -07:00 committed by GitHub
parent 9745a627ea
commit 48662e3d0a
1 changed files with 2 additions and 3 deletions

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@ -152,9 +152,8 @@ To generate this message, Docker took the following steps:
Now would also be a good time to make sure you are using version 1.13 or higher
```
$ docker version
Docker version 17.03.1-ce, build c6d412e
$ docker --version
Docker version 17.05.0-ce-rc1, build 2878a85
```
If you see a messages like the ones above, you're ready to begin the journey.