Uwe Stöhr 65f26a7a14 add support for the package cancel in math (fixes #6819); fileformat change only for the preamble handling
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@40663 a592a061-630c-0410-9148-cb99ea01b6c8
2012-01-23 01:49:49 +00:00
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