pub fn non_fenced_lines(content: &str) -> impl Iterator<Item = (usize, &str)>Expand description
Iterate over lines that are NOT inside fenced code blocks or YAML
frontmatter.
Yields (0-based line index, line content) pairs, skipping lines
within ``` or ~~~ fenced regions, and skipping YAML
frontmatter (--- delimited block at the very start of the file).