fix syntastic warning in airos template

Author: edoput

netjsonconfig/backends/airos/templates/airos.jinja2

@@ -1,7 +1,7 @@
 {% for namespace, block in data.items() %}
 	{% if namespace != 'netmode' %}
 		{% for element in block %}
-			{% for k,v in element.items() %}
+			{% for k, v in element.items() %}
 				{{ namespace }}.{{ k }}={{ v }}
 			{% endfor %}
 		{% endfor %}