Changes

The original edit's summary was accidentally missing license information. The attribution is correct, and the contents of the edit were originally licensed under CC-BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)
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We perform the actual check for whether this is a preview here since
 
We perform the actual check for whether this is a preview here since
 
preprocessing is relatively expensive.
 
preprocessing is relatively expensive.
 +
 
]]
 
]]
 
local frame = mw.getCurrentFrame()
 
local frame = mw.getCurrentFrame()