do not conflate newlines...

wireguard/files/wg.conf

 	{%- endfor -%}
 {%- endmacro -%}
 [Interface]
-{{- output_list_if_set(interface, 'address', 'Address') }}
-{{- output_if_set(interface, 'listenport', 'ListenPort') }}
-{{- output_list_if_set(interface, 'dns', 'DNS') }}
-{{- output_if_set(interface, 'mtu', 'MTU') }}
-{{- output_if_set(interface, 'privatekey', 'PrivateKey') }}
-{{- output_if_set(interface, 'table', 'Table') }}
-{{- output_if_set(interface, 'preup', 'PreUp') }}
-{{- output_if_set(interface, 'postup', 'PostUp') }}
-{{- output_if_set(interface, 'predown', 'PreDown') }}
-{{- output_if_set(interface, 'postdown', 'PostDown') }}
-{{- output_if_set(interface, 'saveconfig', 'SaveConfig') }}
-{{- output_if_set(interface, 'fwmark', 'FwMark') }}
+{{ output_list_if_set(interface, 'address', 'Address') }}
+{{ output_if_set(interface, 'listenport', 'ListenPort') }}
+{{ output_list_if_set(interface, 'dns', 'DNS') }}
+{{ output_if_set(interface, 'mtu', 'MTU') }}
+{{ output_if_set(interface, 'privatekey', 'PrivateKey') }}
+{{ output_if_set(interface, 'table', 'Table') }}
+{{ output_if_set(interface, 'preup', 'PreUp') }}
+{{ output_if_set(interface, 'postup', 'PostUp') }}
+{{ output_if_set(interface, 'predown', 'PreDown') }}
+{{ output_if_set(interface, 'postdown', 'PostDown') }}
+{{ output_if_set(interface, 'saveconfig', 'SaveConfig') }}
+{{ output_if_set(interface, 'fwmark', 'FwMark') }}
 
 {%- for peer in interface.get('peers', []) -%}
 [Peer]
-{{- output_if_set(peer, 'publickey', 'PublicKey') }}
-{{- output_if_set(peer, 'presharedkey', 'PresharedKey') }}
-{{- output_list_if_set(peer, 'allowedips', 'AllowedIPs') }}
-{{- output_if_set(peer, 'endpoint', 'Endpoint') }}
-{{- output_if_set(peer, 'persistentkeepalive', 'PersistentKeepalive') }}
+{{ output_if_set(peer, 'publickey', 'PublicKey') }}
+{{ output_if_set(peer, 'presharedkey', 'PresharedKey') }}
+{{ output_list_if_set(peer, 'allowedips', 'AllowedIPs') }}
+{{ output_if_set(peer, 'endpoint', 'Endpoint') }}
+{{ output_if_set(peer, 'persistentkeepalive', 'PersistentKeepalive') }}
 {%- endfor -%}