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

docs/man/man3/ansible.service.3

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+.TH ANSIBLE.SERVICE 5 "2012-10-02" "0.8" "ANSIBLE MODULES"
+." generated from library/service
+.SH NAME
+service \- Manage services.
+." ------ DESCRIPTION
+.SH DESCRIPTION
+.PP
+Controls services on remote hosts. 
+." ------ OPTIONS
+."
+."
+.SH OPTIONS
+
+.IP pattern
+If the service does not respond to the status command, name a substring to look for as would be found in the output of the \fIps\fR command as a stand-in for a status result.  If the string is found, the servie will be assumed to be running.(Added in Ansible version 0.7.)
+
+.IP state
+\fIstarted\fR, \fIstopped\fR, \fIreloaded\fR, \fIrestarted\fR. \fIStarted\fR/\fIstopped\fR are idempotent actions that will not run commands unless necessary.  \fIrestarted\fR will always bounce the service.  \fIreloaded\fR will always reload.
+.IR Choices :
+running,started,stopped,restarted,reloaded.
+.IP enabled
+Whether the service should start on boot.
+.IR Choices :
+yes,no.
+.IP name
+Name of the service.(required)."
+."
+." ------ NOTES
+."
+."
+." ------ EXAMPLES
+.SH EXAMPLES
+.PP
+.nf
+service name=httpd state=started
+.fi
+.PP
+.nf
+service name=httpd state=stopped
+.fi
+.PP
+.nf
+service name=httpd state=restarted
+.fi
+.PP
+.nf
+service name=httpd state=reloaded
+.fi
+.PP
+.nf
+service name=foo pattern=/usr/bin/foo state=started
+.fi
+." ------- AUTHOR
+.SH AUTHOR
+Michael DeHaan
+.SH SEE ALSO
+.IR ansible (1),
+.I http://ansible.github.com/modules.html#service