[texhax] strange conflicts

[Victor Ivrii]

On Tue, Dec 20, 2016 at 5:16 PM, Herbert Schulz <herbs at wideopenwest.com>
wrote:

> \externaldocument




It is described in the commented introduction to  xr-hyper.sty. Probably I
would not find it if I have not known this command for years
-- 

Victor Ivrii
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