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Body Context: The `format_learning_body` helper used `sanitize: false` to preserve `<strong>` tags, but this also allowed other raw HTML from the source text (like `<input>`) to render. Backticks (`) were preserved but had no special styling. Resolution: I modified the `format_learning_body` helper: 1. Escape all HTML first (`ERB::Util.html_escape`). 2. Bold keywords (`<strong>`) on escaped string. 3. Wrap backticked content (`) with `<code>` tags on bolded string. 4. Apply `simple_format(..., sanitize: false)` last. 5. Added CSS for `code` tag. Learning: When displaying potentially unsafe text that also needs specific safe HTML formatting, I learned the order matters: Escape first, then selectively add safe tags, then apply structural formatting (like `simple_format` with `sanitize: false`).

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