Problem:

• Mermaid flowchart nodes had text truncation issues
• Some code examples were not fully visible

Solution:

• Added line breaks (
  ) to distribute content across multiple lines
• Reduced node width by reformatting long lines

Changes:

• Lines 182-196 in c-cpp-book/src/ch07-1-lifetimes-and-borrowing-deep-dive.md

Before:

After: