Simplify whitespace handling in build/ Jinja templates

Source/build/scripts/templates/RuntimeEnabledFeatures.cpp.tmpl

-{% from "macros.tmpl" import wrap_with_condition, license -%}
+{% from "macros.tmpl" import wrap_with_condition, license %}
 {{ license() }}
 
 #include "config.h"
 #include "RuntimeEnabledFeatures.h"
 
 namespace WebCore {
+{# FIXME: remove excess blank line #}
 
 {% for feature_set in feature_sets %}
+
 void RuntimeEnabledFeatures::set{{feature_set|capitalize}}FeaturesEnabled(bool enable)
 {
-{%- for feature in features if feature.status == feature_set %}
+{% for feature in features if feature.status == feature_set %}
     set{{feature.name}}Enabled(enable);
-{%- endfor %}
+{% endfor %}
 }
 {% endfor %}
 
-{%- for feature in features if not feature.custom %}
-{%- call wrap_with_condition(feature.condition) %}
+{% for feature in features if not feature.custom %}
+{% call wrap_with_condition(feature.condition) %}
 bool RuntimeEnabledFeatures::is{{feature.name}}Enabled = {{'true' if feature.status == 'stable' else 'false'}};
-{%- endcall %}
-{%- endfor %}
+{% endcall %}
+{% endfor %}
 
 } // namespace WebCore