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Rodrigo GresslerandClaude Opus 5.5 28fe95fff0 DXF: save pre-2007 text in the file's code page instead of all \U+ escapes
Before 2007, DXF text is in the code page `$DWGCODEPAGE` names. Since #169
every non-ASCII character was written as a `\U+XXXX` escape, so a Portuguese
drawing saved at 2000/2004 had layers, blocks and text such as
`A\U+00E7\U+00E3o` in the file. Characters the declared code page has are now
written as its bytes (`Ação` in ANSI_1252); the others are still escaped, and
an unknown code page still gives pure ASCII. The DWG bridge is unchanged.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-10-19 16:36:13 -03:00
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