Library functions and modules should be in the 3 man page section. Also the files should end in '.3'

docs/man/man3/ansible.selinux.3

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+.TH ANSIBLE.SELINUX 5 "2012-10-02" "0.8" "ANSIBLE MODULES"
+." generated from library/selinux
+.SH NAME
+selinux \- Change policy and state of SELinux
+." ------ DESCRIPTION
+.SH DESCRIPTION
+.PP
+Configures the SELinux mode and policy. A reboot may be required after usage. Ansible will not issue this reboot but will let you know when it is required. 
+." ------ OPTIONS
+."
+."
+.SH OPTIONS
+
+.IP policy
+name of the SELinux policy to use (example: 'targeted')(required)
+.IP state
+The SELinux mode
+.IR Choices :
+enforcing,permissive,disabled.(required)
+.IP conf
+path to the SELinux configuration file, if non-standard (default: /etc/selinux/config)."
+."
+." ------ NOTES
+.SH NOTES
+.PP
+Not tested on any debian based system 
+."
+."
+." ------ EXAMPLES
+.SH EXAMPLES
+.PP
+.nf
+selinux policy=targeted state=enforcing
+.fi
+.PP
+.nf
+selinux policy=targeted state=disabled
+.fi
+." ------- AUTHOR
+.SH AUTHOR
+Derek Carter
+.SH SEE ALSO
+.IR ansible (1),
+.I http://ansible.github.com/modules.html#selinux