Improve regex support for URL path matching

Closes gh-28815

spring-core/src/test/java/org/springframework/util/AntPathMatcherTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -131,6 +131,7 @@ class AntPathMatcherTests {
 
 		assertThat(pathMatcher.match("/{bla}.*", "/testing.html")).isTrue();
 		assertThat(pathMatcher.match("/{bla}", "//x\ny")).isTrue();
+		assertThat(pathMatcher.match("/{var:.*}", "/x\ny")).isTrue();
 	}
 
 	@Test