DOCS: standardize on EXAMPLES (a.k.a. Docs-JumboPatch JetLag Edition)

Migrated all examples: in DOCUMENTATION=''' string to standalone EXAMPLES=''' string
  Added deprecation warning to moduledev.rst and remove deprecated example from it
  Fixed up a few typos and uppercased some acronyms.
  add consistency to how EXAMPLES are formatted

library/system/group

@@ -48,12 +48,14 @@ options:
         choices: [ "yes", "no" ]
         description:
             - If I(yes), indicates that the group created is a system group.
-examples:
-    - code: "group: name=somegroup state=present"
-      description: Example group command from Ansible Playbooks
 
 '''
 
+EXAMPLES = '''
+# Example group command from Ansible Playbooks
+- group: name=somegroup state=present
+'''
+
 import grp
 import syslog
 import platform