I'd say this is a critical documentation bug that leads to head bang when you try to figure out what does '*' in code means.

This bug is two fold:
1. Define a dedicated place in documentation for '*' operator with examples. I propose http://docs.python.org/3/library/stdtypes.html chapter with a name like "Special Operations" or "Function Argument Operations" or "Function Argument Operators"
 
2. Make '*', 'asterisk', 'splat', 'star' operator searchable
http://docs.python.org/3/search.html?q=*
http://docs.python.org/3/search.html?q=asterisk
http://docs.python.org/3/search.html?q=splat
http://docs.python.org/3/search.html?q=star+operator

Good?

References:
http://stackoverflow.com/questions/2322355/proper-name-for-python-operator
http://stackoverflow.com/questions/5239856/foggy-on-asterisk-in-python
http://stackoverflow.com/questions/2921847/python-once-and-for-all-what-does-the-star-operator-mean-in-python
http://stackoverflow.com/questions/287085/what-do-args-and-kwargs-mean
http://stackoverflow.com/search?q=[python]+%2Bkwargs+is%3Aquestion