Fix docstring in sage/crypto/boolean_function.pyx

[jdemeyer]

Needed for upgrade to Python 2.7.2 (#9958). There is a problem with the math block in

    def annihilator(self,d, dim = False):
        """
        Return (if it exists) an annihilator of the boolean function of
        degree at most `d`, that is a Boolean polynomial `g` such that

        .. math::

            f(x)g(x) = 0 \forall x.

This results in

docstring of sage.crypto.boolean_function:4: WARNING: Block quote ends without a blank line; unexpected unindent.

Note that the warning does not at all refer to the function "annihilator". I had to do a binary search in the .pyx file to find where the problem lies.

Component: doctest coverage

Author: Jeroen Demeyer, André Apitzsch

Reviewer: Volker Braun

Merged: sage-4.8.alpha3

Issue created by migration from https://trac.sagemath.org/ticket/12085

[jdemeyer]

comment:1

Attached patch improves the documentation, but unfortunately it does not fix the docbuild warning.

[a-andre]

comment:3

Have you tried the raw mode? That fixed a similar problem mentioned in #9608.

[jdemeyer]

comment:4

Attachment: 12085.patch.gz

Replying to @a-andre:

Have you tried the raw mode? That fixed a similar problem mentioned in #9608.

Fantastic!

[jdemeyer]

Changed author from Jeroen Demeyer to Jeroen Demeyer, André Apitzsch

[vbraun]

Reviewer: Volker Braun

[vbraun]

comment:5

Yep, without raw mode the backslash will wreak havoc...

[jdemeyer]

comment:6

Replying to @vbraun:

Yep, without raw mode the backslash will wreak havoc...

True, but I'm still wondering why it works with Python 2.6 but not with Python 2.7.

[kcrisman]

comment:7

Yep, without raw mode the backslash will wreak havoc...

True, but I'm still wondering why it works with Python 2.6 but not with Python 2.7.

Yeah, that is weird... this is where it shows up, but \f has been one of these for quite a while... because I always have to do \\frac when using labels in plots :)

[jdemeyer]

Merged: sage-4.8.alpha3