small whitespace adjustment

templates/sudo/etc/pam.d/sudo.erb

@@ -15,6 +15,7 @@ password   include      common-auth
 session    optional     pam_keyinit.so revoke
 session    required     pam_limits.so
 <%- if (@debuild) then -%>
+
 # Instead of including the stock common-session-noninteractive we
 # use parts of it, overriding minimum_uid for pam_afs_session
 # so that sudo will be able to get AFS tokens (helps with cowbuilder)