EnigmaCurry/blogofile_blog — pull request #24 by zsoldosp (2013-01-16 11:05:32+00:00)
Title: on YAML error display the original error message

while the exception was present in the format arguments,
it didn't have a placeholder in the actual error message
string that was being formatted.

Note: str.format and the old style % have different behavior (python 2.6/2.7):
```python
>>> '%s %s' % ('sdf', 'qwerty', 'this is the omitted third argument')
Traceback (most recent call last):
File "", line 1, in
TypeError: not all arguments converted during string formatting
>>> '{0} {1}'.format('sdf', 'qwerty', 'this is the omitted third argument')
'sdf qwerty'