Function collapse_blank_lines

scripts/postprocess_fulltext.py:429–431

Replace 3+ consecutive blank lines with 2.

(content: str)

# ── collapse excess blank lines ───────────────────────────────────────────────

def collapse_blank_lines(content: str) -> str:
    """Replace 3+ consecutive blank lines with 2."""
    return re.sub(r'\n{4,}', '\n\n\n', content)


# ── repeated header/footer and cover image cleanup ───────────────────────────