Change example syntax on rpm_key module

lib/ansible/modules/packaging/os/rpm_key.py

@@ -52,13 +52,19 @@ options:
 
 EXAMPLES = '''
 # Example action to import a key from a url
-- rpm_key: state=present key=http://apt.sw.be/RPM-GPG-KEY.dag.txt
+- rpm_key:
+    state: present
+    key: 'http://apt.sw.be/RPM-GPG-KEY.dag.txt'
 
 # Example action to import a key from a file
-- rpm_key: state=present key=/path/to/key.gpg
+- rpm_key:
+    state: present
+    key: /path/to/key.gpg
 
 # Example action to ensure a key is not present in the db
-- rpm_key: state=absent key=DEADB33F
+- rpm_key:
+    state: absent
+    key: DEADB33F
 '''
 import re
 import os.path