Files
qelectrotech-source-mirror/sources
ispyisail 4efe28ce03 Fix title blocks with a line break writing an unreadable DXF
A title block cell holding a line break (tableau_domestique.qet's
"DESSINE" + CR LF + "%{author}") was written into the DXF as one TEXT
value with the break inside it. A DXF value ends at the line break, so
every group code after it was off by one line: ezdxf refuses all five
folios of that example with DXFStructureError, and other readers take
values for codes.

- TitleBlockTemplate::renderTextCellDxf() writes each line of a cell as
  its own TEXT, stacked by the cell's vertical alignment as the screen
  shows them, 1.6 text heights apart as the diagram texts' DXF export
  does. A single-line cell is written exactly as before.
- Createdxf's text writers turn any line break still in a value into a
  space, so no other caller can break the file either.

Checked in the Export dialog: tableau_domestique.qet's five folios, which
ezdxf refused on master, now read with no audit errors; grafcet.qet, which
has no line break, keeps exactly the same entities. (Byte comparison waits
on the DXF entity-order fix: until then every export reorders its entities.)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G2d2Zi8BfrYRPX88zhaoFG
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fix
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