pub fn splice_marked_block(existing: Option<&[u8]>, block: &str) -> Vec<u8> ⓘExpand description
The whole document’s bytes after splicing a marked block into it.
A fresh file where none exists, the block replaced in place where one
is marked, appended after the target’s own content otherwise:
release-kit owns the lines inside the markers, not the document. Both
markdown destinations take this shape, AGENTS.md and the glossary.