[dhh]

Plain refused any file with a U+2029 paragraph separator in it, since QTextDocument uses that character to separate its blocks and would have turned it into a line break. Even Plain's own FindBar.qml couldn't be opened.

Now a U+2029 is held in the editor as U+FDEF and turned back on save, so the file round-trips byte for byte. U+FDEF is a Unicode noncharacter, set aside for a program's internal use, so typed or pasted text won't carry one (U+FDD0 is out, since Qt uses it to begin a frame). Only a file that already contains U+FDEF is refused, since saving would change it. The stand-in likely shows as a placeholder glyph, and copying it puts U+FDEF on the clipboard.

FindBar.qml now spells its own U+2029 as "
" instead of the invisible character.

🤖 Generated with Claude Code

[greptile-apps]

Confidence Score: 5/5

[Medium impact] No new blocking issue was found in the latest changes.

Summary

Plain can open files containing U+2029 by holding that character as U+FDEF and restoring it on save.

• Files with paragraph marks now open without turning them into line breaks.

_{Reviews (2) · Last reviewed commit: "Stand U+2029 in with a noncharacter rath..." · Reviewed by Greptile}