Polish "Allow UriTemplate to be built with an empty template"

See gh-32432

spring-web/src/main/java/org/springframework/web/util/UriTemplate.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

spring-web/src/test/java/org/springframework/web/util/UriTemplateTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,6 +36,16 @@
  */
 class UriTemplateTests {
 
+	@Test
+	void emptyPathDoesNotThrowException() {
+		assertThatNoException().isThrownBy(() -> new UriTemplate(""));
+	}
+
+	@Test
+	void nullPathThrowsException() {
+		assertThatIllegalArgumentException().isThrownBy(() -> new UriTemplate(null));
+	}
+
 	@Test
 	void getVariableNames() {
 		UriTemplate template = new UriTemplate("/hotels/{hotel}/bookings/{booking}");
@@ -219,14 +229,4 @@ void expandWithAtSign() {
 		assertThat(uri.toString()).isEqualTo("http://localhost/query=foo@bar");
 	}
 
-	@Test
-	void emptyPathDoesNotThrowException() {
-		assertThatNoException().isThrownBy(() -> new UriTemplate(""));
-	}
-
-	@Test
-	void emptyPathThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> new UriTemplate(null));
-	}
-
 }