[core/output] Add tests for pango formatting

core/output.py

@@ -52,7 +52,7 @@ class block(object):
         text = attr.get('full_text', '')
         if 'full_text' in attr:
             del attr['full_text']
-        result = '<span '
+        result = '<span'
         for key, value in attr.items():
             result = '{} {}="{}"'.format(result, key, value)
         result = '{}>{}</span>'.format(result, text)