Apply SingleSpaceSeparator Checkstyle module

This commit also fixes its violations.

Closes gh-31469

spring-aspects/src/test/java/org/springframework/cache/config/AnnotatedClassCacheableService.java

@@ -209,7 +209,7 @@ public class AnnotatedClassCacheableService implements CacheableService<Object>
 	}
 
 	@Override
-	@Caching(evict = { @CacheEvict("primary"), @CacheEvict(cacheNames = "secondary", key = "#a0"),  @CacheEvict(cacheNames = "primary", key = "#p0 + 'A'") })
+	@Caching(evict = { @CacheEvict("primary"), @CacheEvict(cacheNames = "secondary", key = "#a0"), @CacheEvict(cacheNames = "primary", key = "#p0 + 'A'") })
 	public Object multiEvict(Object arg1) {
 		return this.counter.getAndIncrement();
 	}

spring-aspects/src/test/java/org/springframework/context/annotation/aspectj/AnnotationBeanConfigurerTests.java

@@ -37,7 +37,7 @@ public class AnnotationBeanConfigurerTests {
 
 	@Test
 	public void injection() {
-		try (AnnotationConfigApplicationContext context = new  AnnotationConfigApplicationContext(Config.class)) {
+		try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(Config.class)) {
 			ShouldBeConfiguredBySpring myObject = new ShouldBeConfiguredBySpring();
 			assertThat(myObject.getName()).isEqualTo("Rod");
 		}