Small fix in dev env docs

Signed-off-by: Philipp Wahala <philipp.wahala@gmail.com>
(cherry picked from commit fbc0ea32e8)

Conflicts:
	docs/project/set-up-dev-env.md

docs/project/set-up-dev-env.md

@@ -96,9 +96,9 @@ environment.
 
 1. Open a terminal.
 
-    Mac users, use `boot2docker status` to make sure Boot2Docker is running. You
-    may need to run `eval "$(boot2docker shellinit)"` to initialize your shell
-    environment.
+    Mac users, use `docker-machine status your_vm_name` to make sure your VM is
+    running. You may need to run `eval "$(docker-machine env your_vm_name)"` to
+    initialize your shell environment.
 
 3. Change into the root of your forked repository.
 
@@ -193,7 +193,7 @@ environment.
     Keeping the ancestor images improves the build performance. When you rebuild
     the child image, the build process uses the local ancestors rather than
     retrieving them from the Hub. The build process gets new ancestors only if
-    DockerHub has updated versions.
+    Docker Hub has updated versions.
 
 ## Start a container and run a test