update environment example

examples/playbooks/environment.yml

@@ -14,11 +14,12 @@
   vars:
     env: 
        HI: test2
-       http_proxy=http://proxy.example.com:8080
+       http_proxy: http://proxy.example.com:8080
 
   tasks:
 
     # here we just define the dictionary directly and use it
+    # (here $HI is the shell variable as nothing in Ansible will replace it)
 
     - shell: echo $HI
       environment:
@@ -27,6 +28,6 @@
     # here we are using the $env variable above
     
     - shell: echo $HI
-      environment: $env
+      environment: env