Summary by CodeRabbit

• Documentation
  • Enhanced the macro explanation in the challenge description with clearer details about macro functionality, compile-time execution, variadic arguments, and how to recognize macros.

Walkthrough

The file challenges/printing-hello-world/description.md had its macro description section expanded. A single terse line defining macros as "a way to write code that writes code" was replaced with a multi-point explanation covering compile-time execution, variadic argument support, context-aware expansion, recognition via exclamation marks, and a note about implementation details. The change is purely instructional and affects only documentation prose with no impact on code or system behavior.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~5 minutes

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