fix: diff enforces one line per file

This allows for whitespaces in file names and is a much cleaner approach.

Author: siredmar

pipeline.go

@@ -106,20 +106,16 @@ func diff(command string) ([]string, error) {
 	}
 
 	trimmed := strings.TrimSpace(output)
+	if trimmed == "" {
+		return nil, nil
+	}
 
-	// Git diff --name-only outputs one file per line. Split on newlines to
-	// preserve filenames that contain spaces. Fall back to strings.Fields
-	// for single-line output (e.g. legacy diff commands) for backward compat.
 	var fields []string
-	if strings.Contains(trimmed, "\n") {
-		for _, line := range strings.Split(trimmed, "\n") {
-			line = strings.TrimSpace(line)
-			if line != "" {
-				fields = append(fields, line)
-			}
+	for _, line := range strings.Split(trimmed, "\n") {
+		line = strings.TrimSpace(line)
+		if line != "" {
+			fields = append(fields, line)
 		}
-	} else {
-		fields = strings.Fields(trimmed)
 	}
 
 	paths := make([]string, 0, len(fields))