Escape all Jupyter magics by default

[theodcr]

First thanks for this great tool!

I often use the %watermark (https://github.com/rasbt/watermark) magic extension in my notebooks, adding it to the escaped magics would be useful.

I second the idea of adding a configurable list of magics to be escaped as suggested in #35, notably for custom magics.

[mwouts]

Thanks @theolamayo . I'm glad you like it! I had a second look at #35 , and also at the corresponding unit test, and I am now wondering why I did not simply match magics as commands starting with one or two percent signs... Are you aware of any plain Python instruction that would start with a percent sign? Do you think we could actually escape any percent command?

[theodcr]

Indeed I am not aware of any plain Python instruction that starts with a percent sign. You mentioned Pytest features and decorators in #29 (comment) but they start with a @ sign.

Answers on https://stackoverflow.com/questions/961344/what-does-the-percentage-sign-mean-in-python only mention IPython magics as valid instructions starting with a percent sign.

I also think we could escape any percent command.

[mwouts]

Thanks @theolamayo . Probably there had been a sleepless night before #29... sure, pytest decorators start with @, not %! I also doubled check with Doug at #61, all instructions starting with a single percent sign (up to three actually) are magics. I don't have a excuse now not to fix this... I will do that very soon!

[mwouts]

@theolamayo , the new release (v0.8.0) should have support for all magics. Please reopen if that is not the case! Thanks