Fix UrlPathHelper#shouldRemoveSemicolonContent() (#27303)

The checkReadOnly() method should only be called from
methods that modify properties to prevent modification
of read-only instances.

Fixes #27256

Author: evpaassen

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

@@ -132,7 +132,6 @@ public void setRemoveSemicolonContent(boolean removeSemicolonContent) {
 	 * Whether configured to remove ";" (semicolon) content from the request URI.
 	 */
 	public boolean shouldRemoveSemicolonContent() {
-		checkReadOnly();
 		return this.removeSemicolonContent;
 	}
 

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

@@ -24,6 +24,7 @@
 import org.springframework.web.testfixture.servlet.MockHttpServletRequest;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
 
 /**
  * Unit tests for {@link UrlPathHelper}.
@@ -166,6 +167,11 @@ public void getLookupPathWithSemicolonContentAndNullPathInfo() {
 		assertThat(helper.getLookupPathForRequest(request)).isEqualTo("/welcome.html;c=d");
 	}
 
+	@Test // gh-27303
+	public void shouldRemoveSemicolonContentWithReadOnlyInstance() {
+		assertThatCode(UrlPathHelper.defaultInstance::shouldRemoveSemicolonContent).doesNotThrowAnyException();
+	}
+
 
 	//
 	// suite of tests root requests for default servlets (SRV 11.2) on Websphere vs Tomcat and other containers