https://bugzilla.wikimedia.org/show_bug.cgi?id=40042
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Bug #: 40042
Summary: PDF renderer bug with the chem tag
Product: MediaWiki extensions
Version: unspecified
Platform: All
OS/Version: All
Status: UNCONFIRMED
Severity: normal
Priority: Unprioritized
Component: PdfBook
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
Mobile Platform: ---
I think I have found a bug in the wikipedia PDF renderer.
Go to this page: http://en.wikipedia.org/wiki/Bicarbonate. In the chemistry box
on the right, there is the "Properties" section with "Molecular formula" as the
first record. This record has the value of "CHO_3^-".
Now download the PDF of the page. You will see that in the PDF the same record
has the incorrect value of "CHO". The same applies to
http://en.wikipedia.org/wiki/Carbonate, where "CO_3^2-" becomes "CO" in the
PDF.
This does <u>NOT</u> apply to non-ions like
http://en.wikipedia.org/wiki/Sulfuric_acid, so I think that the problem are the
superscripts, while subscripts cause no problems.
Particularly, it should be the "{{Chem|text|subscript|superscript}}" tag. If
there is no superscript, the PDF is rendered correctly. If there is the
superscript, the renderer seems to ignore both the sub and the super scripts.
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