Update format: log warning message when truncating an error

Author: ggreg

swf/format.py

@@ -1,11 +1,21 @@
 import constants
+import logging
+
+
+logger = logging.getLogger(__name__)
 
 
 def wrap(message, max_length):
     if not message:
         return message
 
     if len(message) > max_length:
+        logger.warning(
+            'message "{}" too long ({} chars), wrapped to {}'.format(
+                message,
+                len(message),
+                max_length,
+            ))
         return message[:max_length]
 
     return message