Correct handling of disable-html-escaping

See gh-39504

Author: wilkinsona

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/gson/GsonAutoConfiguration.java

@@ -93,7 +93,7 @@ public void customize(GsonBuilder builder) {
 			map.from(properties::getFieldNamingPolicy).to(builder::setFieldNamingPolicy);
 			map.from(properties::getPrettyPrinting).whenTrue().toCall(builder::setPrettyPrinting);
 			map.from(properties::getLenient).whenTrue().toCall(builder::setLenient);
-			map.from(properties::getDisableHtmlEscaping).whenFalse().toCall(builder::disableHtmlEscaping);
+			map.from(properties::getDisableHtmlEscaping).whenTrue().toCall(builder::disableHtmlEscaping);
 			map.from(properties::getDateFormat).to(builder::setDateFormat);
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/gson/GsonAutoConfigurationTests.java

@@ -244,15 +244,15 @@ void withoutDisableHtmlEscaping() {
 	void withDisableHtmlEscapingTrue() {
 		this.contextRunner.withPropertyValues("spring.gson.disable-html-escaping:true").run((context) -> {
 			Gson gson = context.getBean(Gson.class);
-			assertThat(gson.htmlSafe()).isTrue();
+			assertThat(gson.htmlSafe()).isFalse();
 		});
 	}
 
 	@Test
 	void withDisableHtmlEscapingFalse() {
 		this.contextRunner.withPropertyValues("spring.gson.disable-html-escaping:false").run((context) -> {
 			Gson gson = context.getBean(Gson.class);
-			assertThat(gson.htmlSafe()).isFalse();
+			assertThat(gson.htmlSafe()).isTrue();
 		});
 	}