DOC/BUG: fix details for 'quoting' parser parameter

```python
Python 2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.

Imported NumPy 1.7.1, SciPy 0.12.0, Matplotlib 1.3.0 + guidata 1.6.1, guiqwt 2.3.1
Type "scientific" for more details.
>>> from csv import QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE
>>> QUOTE_MINIMAL
0
>>> QUOTE_ALL
1
>>> QUOTE_NONNUMERIC
2
>>> QUOTE_NONE
3
>>> 
```