yum-cron: make sure self.output is fully unicode. BZ 1425776

Closes #97.

yum-cron/yum-cron.py

@@ -140,7 +140,11 @@ def sendMessages(self):
  overridden by inheriting classes to emit the messages
  according to their individual methods.
  """
- pass
+ # Convert any byte strings to unicode objects now (so that we avoid
+ # implicit conversions with the "ascii" codec later when join()-ing the
+ # strings, leading to tracebacks).
+ self.output = [x.decode('utf-8') if isinstance(x, str) else x
+ for x in self.output]
 
 
 class EmailEmitter(UpdateEmitter):
@@ -220,6 +224,7 @@ def sendMessages(self):
  """Combine the stored messages that have been stored into a
  single email message, and send this message.
  """
+ super(EmailEmitter, self).sendMessages()
  # Don't send empty emails
  if not self.output:
  return
@@ -262,6 +267,7 @@ def sendMessages(self) :
  """Combine the stored messages that have been stored into a
  single email message, and send this message to standard output.
  """
+ super(StdIOEmitter, self).sendMessages()
  # Don't print blank lines
  if not self.output:
  return