Documentation for ** in pybabel configs is misleading/confusing

[ENuge]

Specifically this line: "In addition, two subsequent asterisk characters (**) can be used to make the wildcard match any directory level, so the pattern **.txt matches any file with the extension .txt in any directory.", from http://babel.pocoo.org/docs/messages/#extraction-method-mapping-and-configuration .

We had an ignore rule: [ignore: **.*.py] that, based on the above, should match any file with the pattern .*.py in any directory. That does not seem to be the case: it doesn't match that pattern anywhere. Without digging into the code, it's difficult to tell if the documentation is misleading or the implementation of ** has issues. Feel free to edit title/description to whatever is most accurate.