Satisfy linter

anthropic_files.go

@@ -105,9 +105,9 @@ func parseMissingFileIDFromBody(raw string) string {
 	// quotes, so the id ends at the first character outside the alphanumeric +
 	// underscore set.
 	end := strings.IndexFunc(rest, func(r rune) bool {
-		return !(r >= 'a' && r <= 'z') &&
-			!(r >= 'A' && r <= 'Z') &&
-			!(r >= '0' && r <= '9') &&
+		return (r < 'a' || r > 'z') &&
+			(r < 'A' || r > 'Z') &&
+			(r < '0' || r > '9') &&
 			r != '_'
 	})
 	if end == -1 {