Description

This PR uses the already-defined slice reference instead of Array.prototype.slice in the app.listen implementation for consistency and micro-optimization.

Changes

• Changed Array.prototype.slice.call(arguments) to slice.call(arguments) in lib/application.js

Rationale

• Improves consistency within the file (uses the cached reference defined at line 33)
• Avoids repeated long-form prototype access
• Slight micro-optimization (cached function reference)
• No behavioral changes
• All tests continue to pass

Testing

All existing tests pass (1236 passing, 2 pending), including all app.listen() tests.

Closes #6896