import re


def process_between(group):
    """Process lines between nodes, that is, comments."""

    # Keep only comments
    group = [line for line in group if line.strip().startswith('#')]
    group = [re.sub(r'^#', '', line) for line in group]
    # Markdown could interpret this as header.
    group = [re.sub(r'={3,}', '', line) for line in group]

    return group