Corrected example for lineinfile due to ': ' on line

Closes #3992

library/files/lineinfile

@@ -124,7 +124,8 @@ EXAMPLES = r"""
 
 - lineinfile: dest=/etc/services regexp="^# port for http" insertbefore="^www.*80/tcp" line="# port for http by default"
 
-- lineinfile: dest=/etc/sudoers state=present regexp='^%wheel' line='%wheel ALL=(ALL) NOPASSWD: ALL'
+# Fully quoted because of the ': ' on the line. See the Gotchas in the YAML docs.
+- lineinfile: "dest=/etc/sudoers state=present regexp='^%wheel' line='%wheel ALL=(ALL) NOPASSWD: ALL'"
 
 - lineinfile: dest=/opt/jboss-as/bin/standalone.conf regexp='^(.*)Xms(\d+)m(.*)$' line='\1Xms${xms}m\3' backrefs=yes
 """