Merge pull request #5732 from jdfreder/quickfix

Quick typo fix in nbformat/convert.py

IPython/nbformat/convert.py

@@ -1,72 +1,72 b''
 """API for converting notebooks between versions.
 
 Authors:
 
 * Jonathan Frederic
 """
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2013  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import re
 
 from .reader import get_version, versions
 
 #-----------------------------------------------------------------------------
 # Functions
 #-----------------------------------------------------------------------------
 
 def convert(nb, to_version):
     """Convert a notebook node object to a specific version.  Assumes that
     all the versions starting from 1 to the latest major X are implemented.
     In other words, there should never be a case where v1 v2 v3 v5 exist without
     a v4.  Also assumes that all conversions can be made in one step increments
     between major versions and ignores minor revisions.
 
     Parameters
     ----------
     nb : NotebookNode
     to_version : int
         Major revision to convert the notebook to.  Can either be an upgrade or
         a downgrade.
     """
 
     # Get input notebook version.
     (version, version_minor) = get_version(nb)
 
     # Check if destination is current version, if so return contents
     if version == to_version:
         return nb
 
     # If the version exist, try to convert to it one step at a time.
     elif to_version in versions:
 
         # Get the the version that this recursion will convert to as a step 
         # closer to the final revision.  Make sure the newer of the conversion
         # functions is used to perform the conversion.
         if to_version > version:
             step_version = version + 1
             convert_function = versions[step_version].upgrade
         else:
             step_version = version - 1
             convert_function = versions[version].downgrade
 
         # Convert and make sure version changed during conversion.
         converted = convert_function(nb)
         if converted.get('nbformat', 1) == version:
             raise Exception("Cannot convert notebook from v%d to v%d.  Operation" \
-                "failed silently." % (major, step_version))
+                "failed silently." % (version, step_version))
 
         # Recursively convert until target version is reached.
         return convert(converted, to_version)
     else:
         raise Exception("Cannot convert notebook to v%d because that " \
                         "version doesn't exist" % (to_version))