book 10: grammar-card example phrases one per line (renders as tappable rows with translations)

Co-authored-by: Cursor <cursoragent@cursor.com>

book-10-lesson-2.module

@@ -322,7 +322,8 @@ INTRO: In this part you'll practice a listening skill: finding the topic and the
 
 CARD: The **topic** is what a paragraph is about. You can say it in just a word or two, like {vending machines} or {money and friendship}.
 
-CARD: The **main idea** is the most important thing the paragraph says about its topic — a complete sentence, like {Machines don't always work.}
+CARD: The **main idea** is the most important thing the paragraph says about its topic — a complete sentence, like
+{Machines don't always work.}
 
 SUMMARY:
 | | What it is | Example |