Update WordCount Regular Expression

Changing the regular expression to a simpler form. Expressing the same idea. There is one concern is that in my opinion the line 25 of the code:
```python
Pref.wrdRx                  = re.compile("^\S+$", re.U)
 ```
should only be:
```python
Pref.wrdRx                  = re.compile("\S+", re.U)
 ```
without the **^** and **$** symbols. But since the original codes have them I point it out here for us for consideration.

[edited title by tito]