fix formatting and clippy warnings in doctor.rs

- Split long println! macros to satisfy rustfmt
- Remove useless format!() calls (clippy::useless_format)
- Add pre-commit checks section to CLAUDE.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ptrthomas

claude.md

@@ -32,6 +32,17 @@ This allows projects to override specific resources (e.g., local extensions) whi
 - `KARATE_HOME` - Override default `~/.karate` global home location
 - `NO_COLOR` - Disable colored output
 
+## Pre-Commit Checks
+
+**Always run before committing:**
+
+```bash
+cargo fmt --all
+cargo clippy -- -D warnings
+```
+
+CI will fail if formatting is incorrect or clippy warnings exist.
+
 ## Testing
 
 ```bash

src/commands/doctor.rs

@@ -297,19 +297,27 @@ fn print_report(report: &DoctorReport) {
     // Config
     println!("{}", style("Configuration").bold().underlined());
     if report.config.global_exists {
-        println!("  Global: {} {}", style("✓").green(), report.config.global_path);
+        println!(
+            "  Global: {} {}",
+            style("✓").green(),
+            report.config.global_path
+        );
     } else {
         println!(
             "  Global: {}",
-            style(format!("(none) create with: karate config --global")).dim()
+            style("(none) create with: karate config --global").dim()
         );
     }
     if report.config.local_exists {
-        println!("  Local:  {} {}", style("✓").green(), report.config.local_path);
+        println!(
+            "  Local:  {} {}",
+            style("✓").green(),
+            report.config.local_path
+        );
     } else {
         println!(
             "  Local:  {}",
-            style(format!("(none) create with: karate config --local")).dim()
+            style("(none) create with: karate config --local").dim()
         );
     }
 }