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MDL-24256 question category editing was messed up.
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The unerlying problem seemed to be too many uses of pass-by-reference in listlib, where it was not necessary.
In investigating this code, I ended up doing a fair bit of cleaning up. Apologies that it leads to an unclear changeset.
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@timhunt
timhunt committed Nov 2, 2010
1 parent b608881 commit 20d8912
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