Make copy & paste of example jobs easier.

Otherwise, the leading whitespace will lead to invalid Python code that
needs to be fixed manually within the Vagrant box.
diff --git a/test/deb/debian-jessie/README.md b/test/deb/debian-jessie/README.md
index a695854..b84ffd9 100644
--- a/test/deb/debian-jessie/README.md
+++ b/test/deb/debian-jessie/README.md
@@ -44,14 +44,16 @@
 
 ## Create a job
 
-    echo "
-    task = SequentialTask(
-      processes = [Process(name = 'hello', cmdline = 'echo hello')],
-      resources = Resources(cpu = 0.5, ram = 128*MB, disk = 128*MB))
-    jobs = [Service(
-      task = task, cluster = 'example', role = 'www-data', environment = 'prod', name = 'hello')]" > hello_world.aurora
+```
+echo "
+task = SequentialTask(
+  processes = [Process(name = 'hello', cmdline = 'echo hello')],
+  resources = Resources(cpu = 0.5, ram = 128*MB, disk = 128*MB))
+jobs = [Service(
+  task = task, cluster = 'example', role = 'www-data', environment = 'prod', name = 'hello')]" > hello_world.aurora
 
-    aurora job create example/www-data/prod/hello hello_world.aurora
+aurora job create example/www-data/prod/hello hello_world.aurora
+```
 
 ## Troubleshooting
 
diff --git a/test/deb/ubuntu-trusty/README.md b/test/deb/ubuntu-trusty/README.md
index 124b8f1..bb79341 100644
--- a/test/deb/ubuntu-trusty/README.md
+++ b/test/deb/ubuntu-trusty/README.md
@@ -44,15 +44,16 @@
 
 ## Create a job
 
-    echo "
-    task = SequentialTask(
-      processes = [Process(name = 'hello', cmdline = 'echo hello')],
-      resources = Resources(cpu = 0.5, ram = 128*MB, disk = 128*MB))
-    jobs = [Service(
-      task = task, cluster = 'example', role = 'www-data', environment = 'prod', name = 'hello')]" > hello_world.aurora
+```
+echo "
+task = SequentialTask(
+  processes = [Process(name = 'hello', cmdline = 'echo hello')],
+  resources = Resources(cpu = 0.5, ram = 128*MB, disk = 128*MB))
+jobs = [Service(
+  task = task, cluster = 'example', role = 'www-data', environment = 'prod', name = 'hello')]" > hello_world.aurora
 
-    aurora job create example/www-data/prod/hello hello_world.aurora
-
+aurora job create example/www-data/prod/hello hello_world.aurora
+```
 ## Troubleshooting
 
 * Mesos: `/var/log/mesos`
diff --git a/test/rpm/centos-7/README.md b/test/rpm/centos-7/README.md
index 5fa398b..bb34fb6 100644
--- a/test/rpm/centos-7/README.md
+++ b/test/rpm/centos-7/README.md
@@ -42,14 +42,16 @@
 
 ## Create a job
 
-    echo "
-    task = SequentialTask(
-      processes = [Process(name = 'hello', cmdline = 'echo hello')],
-      resources = Resources(cpu = 0.5, ram = 128*MB, disk = 128*MB))
-    jobs = [Service(
-      task = task, cluster = 'main', role = 'vagrant', environment = 'prod', name = 'hello')]" > hello_world.aurora
+```
+echo "
+task = SequentialTask(
+  processes = [Process(name = 'hello', cmdline = 'echo hello')],
+  resources = Resources(cpu = 0.5, ram = 128*MB, disk = 128*MB))
+jobs = [Service(
+  task = task, cluster = 'main', role = 'vagrant', environment = 'prod', name = 'hello')]" > hello_world.aurora
 
-    aurora job create main/vagrant/prod/hello hello_world.aurora
+aurora job create main/vagrant/prod/hello hello_world.aurora
+```
 
 ## Troubleshooting