Revise individual block contents of a learning guide on the topic "{topic}". One PROBLEM is noted per block (correctness, completeness, or scope). Fix ONLY the noted problem; whatever is in order stays untouched.

{facts}

TASKS — per block, the problem and the current content:
{tasks}

Write all revised content in GERMAN (the guide is for German-speaking learners), even though these instructions are in English.

Write ONLY the file {out_path} — one section marker per revised block (title EXACTLY as in the task), with the corrected points beneath it:

<!-- section: exact block title -->
- Core point …
- Core point …
Example: short idea of what the example shows

Write the marker line exactly like that. No text outside the sections.
{extra}