[AB#557] style: Apply automated formatting

- Format markdown sections with proper spacing
- Align test struct fields
- Clean up whitespace in exec.go

Author: ChronosMasterOfAllTime

.github/copilot-instructions.md

@@ -320,6 +320,7 @@ Before submitting a PR:
 **For developers who want to test against Windows/other platforms locally**, you can use [nektos/act](https://github.com/nektos/act) to run GitHub Actions workflows on your machine:
 
 **Installation**:
+
 ```bash
 # macOS
 brew install act
@@ -332,6 +333,7 @@ choco install act-cli
 ```
 
 **Usage**:
+
 ```bash
 # Run all CI tests (includes Windows)
 act
@@ -346,12 +348,14 @@ act --platform ubuntu-latest=catthehacker/ubuntu:act-latest
 act --dryrun
 ```
 
-**Note**: 
+**Note**:
+
 - Windows containers require Docker Desktop with Windows containers enabled
 - For Windows-specific tests, you may need larger runners: `act -P windows-latest=-self-hosted`
 - CI will always run full cross-platform tests automatically when you push
 
 **When to use local cross-platform testing**:
+
 - ✅ Testing platform-specific code (Windows batch files, Unix shell scripts, path handling)
 - ✅ Verifying OS-specific features (environment variables, file permissions, executables)
 - ✅ Testing changes to shims, install scripts, or platform detection

cmd/shims/exec.go

@@ -428,7 +428,7 @@ func prependToPath(env []string, dir string) []string {
 	if idx, actualKey := findEnvVar(env, "PATH"); idx != -1 {
 		// Found PATH, extract current value and prepend new directory
 		currentPath := env[idx][len(actualKey)+1:] // +1 for the "=" sign
-		
+
 		// Detect separator from existing PATH to handle cross-platform scenarios
 		// (e.g., testing Unix-style paths on Windows)
 		sep := string(os.PathListSeparator) // default to OS separator
@@ -437,7 +437,7 @@ func prependToPath(env []string, dir string) []string {
 		} else if strings.Contains(currentPath, ":") {
 			sep = ":"
 		}
-		
+
 		newPath := dir + sep + currentPath
 		// Preserve original key casing (e.g., "Path" on Windows, "PATH" on Unix)
 		env[idx] = actualKey + "=" + newPath

cmd/shims/exec_test.go

@@ -334,11 +334,11 @@ func TestExecWithShims(t *testing.T) {
 // TestFindEnvVar tests the case-insensitive environment variable finder
 func TestFindEnvVar(t *testing.T) {
 	tests := []struct {
-		name         string
-		env          []string
-		key          string
-		expectedIdx  int
-		expectedKey  string
+		name          string
+		env           []string
+		key           string
+		expectedIdx   int
+		expectedKey   string
 		onlyOnWindows bool
 	}{
 		{
@@ -564,7 +564,7 @@ func TestWindowsPathPreservation(t *testing.T) {
 			require.NotEmpty(t, pathValue, "PATH should be present in result")
 
 			// Verify the new directory was prepended
-			assert.True(t, strings.HasPrefix(pathValue, tt.dir+";"), 
+			assert.True(t, strings.HasPrefix(pathValue, tt.dir+";"),
 				"PATH should start with new directory: got %s", pathValue)
 
 			// Verify the original path component is still present (regression test for #557)