attdef and atrib tag is one word and R13 (tested on R14) supports utf8 string for it.
dwgadd don't encode utf8 string in case of tag actually.
dwgadd: Fix attdef and attrib tag for releases which could use utf8
This is a GitHub Issue
repo:libredwg
owner:LibreDWG
Title : dwgadd: Fix attdef and attrib tag for releases which could use utf8
Issue date:

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attdef and atrib tag is one word and R13 (tested on R14) supports utf8 string for it.
dwgadd don't encode utf8 string in case of tag actually.
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