Fix alignment of templated files

Jinja directives keep indentation. Therefore, if tokens like
`{% for … %}` are indented, the indentation accumulates and this creates
confusing indentation in output.

templates/bird.conf

@@ -18,12 +18,12 @@ protocol ospf v3 {
 		export all;
 	};
 	area 0 {
-		{% for br in c.bridges %}
+{% for br in c.bridges %}
 		interface "net_{{br.num}}" {
 			cost 10;
 			type broadcast;
 		};
-		{% endfor %}
+{% endfor %}
 	};
 }
 

templates/interfaces

@@ -5,9 +5,9 @@ iface lo inet loopback
 auto /eth*
 mapping eth*
 	script TODO/get-mac-address.sh
-	{% for br in c.bridges %}
+{% for br in c.bridges %}
 	map 52:54:00:17:{{ '%02x:%02x' % (c.num, br.num) }} net_{{br.num}}
-	{% endfor %}
+{% endfor %}
 
 {% for br in c.bridges %}
 iface net_{{br.num}} inet static