Description of problem:
Pybliographer command prompt crashes with a value error if you enter "exit()" at the prompt.
The same error happens if you enter "quit()" instead of "quit".

ValueError: I/O operation on closed file

What follows is the shell output for the session that produces this error:

$ pybliographer
This is pybliographer, version 1.2.16
Copyright (C) 1998-2004 Frederic GOBRY
This is free software with ABSOLUTELY NO WARRANTY.
For details, type `warranty'.
Useful commands:
	help     to get some help
	quit     to quit

>> exit()
Traceback (most recent call last):
  File "/usr/bin/pybliographer", line 235, in <module>
    exec (user, user_global)
  File "<input>", line 2, in <module>
  File "/usr/lib64/python2.7/site.py", line 364, in __call__
    raise SystemExit(code)
SystemExit: None
>> Traceback (most recent call last):
  File "/usr/bin/pybliographer", line 194, in <module>
    line = raw_input (prompt)
ValueError: I/O operation on closed file

Version-Release number of selected component:
pybliographer-1.2.16-1.fc20

Additional info:
reporter:       libreport-2.2.2
cmdline:        /usr/bin/python /usr/bin/pybliographer
executable:     /usr/bin/pybliographer
kernel:         3.14.4-200.fc20.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
#1 <module> in /usr/bin/pybliographer:194