Fix rust-analyzer warnings

[scaryrawr]

GPT-5.2

[Copilot]

Pull request overview

This PR addresses rust-analyzer warnings by refactoring code to follow idiomatic Rust patterns. The changes simplify verbose constructs, remove unnecessary annotations, and eliminate unused imports without altering any functionality.

Changes:

• Simplified Result-to-bool conversions using .is_ok() instead of match expressions
• Removed unnecessary explicit lifetime annotations where Rust can infer them
• Replaced verbose match expressions with cleaner if let patterns
• Removed unused result assignments for functions returning unit type
• Cleaned up unused imports

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
libraries/websl/src/lib.rs	Replaced match expressions with .is_ok() in three train functions (add_d51, add_logo, add_c51)
libraries/libsl/src/print_car.rs	Removed unnecessary explicit lifetime annotations from car_text function
libraries/libsl/src/mvaddstr.rs	Simplified negated condition from !(x < 0) to x >= 0
libraries/libsl/src/add_smoke.rs	Removed unused result assignments (_ =) for mvaddstr calls
libraries/libsl/src/add_man.rs	Removed unused result assignment for mvaddstr call
apps/sl/src/main.rs	Replaced match expressions with if let patterns for cleaner error handling
apps/sl/src/cli.rs	Removed unused command import from clap