[PATCH 1 of 1] tests: asciify output of tsttest

[Mads Kiilerich]

 Yuya Nishihara wrote, On 09/19/2010 04:30 PM:
> Martin Geisler wrote:
>> Yuya Nishihara <yuya at tcha.org> writes:
>>> It'll be simple if we can just write s.encode('string-escape') or
>>> repr(s)[1:-1] without re.sub(), but it's necessary to avoid unwanted
>>> escapes like \t, \n, \'.
>> I think the simplest way is to use
>>
>>   s.encode('string-escape').replace(r'\'', '\'').replace(r'\n', '\n')
> It breaks edge case:
>
> In [22]: r'\n'
> Out[22]: '\\n'
> In [25]: r'\n'.encode('string-escape').replace('\\\\', '\\').replace(r'\n', '\n')
> Out[25]: '\n'
>
> unescape needs to be done at once.

Yes, unescape generally has to be done at once. But we don't want to
unescape backslash. We just want to unescape "'", so I agree with Martin
that it will work in _this_ case.

IIRC unescaping of \n isn't necessary.

I'm a bit in doubt if we should unescape \t too. Having \t in the output
makes it less readable, but it also makes it obvious what the output
really is.

/Mads