The rules for splitting lines differ in a signed book from how it's displayed in a book and quill.
Steps to reproduce
Write the following text in a book quill:
This is a test book wit- h a word split across a line.
Sign the book.
Observe that the line break changed location, breaking the text.
Note
This does not occur when a newline is used instead of a space after the '-' character in the example.
Related issues
Attachments
Comments


See book-before.png and book-signed.png for a constructed example showing how text can be lost by this bug. The text is
----------------- ii- ------------------
----------------- ii- ------------------
----------------- ii- ------------------
Ooops, way to low now.

Unfixable. MC-31113

Dupe of "Colored text isn't colored" ?

Yep. MC-73204 is marked as such.

Unfortunately Sonic is probably right. The formatting for written books is different from book and quills'.

I don't understand what this bug has to do with either of the linked bugs. This isn't about using unsupported things like colors, or formatting with third party tools or commands or anything like that at all. My no mods/no commands/pure survival vanilla written books become unreadable as the bottom text gets pushed down below the bottom of the page. It still happens in 1.13.2, and this is not some kind of "unfixable" bug. It's literally just an off by a pixel or so discrepancy between the word wrapping used for rendering text a book and quill and the word wrapping used for rendering text in a signed book.