Merge previously split strings

Merge some string lines that were previously split because of the
90 chars wide formatting.

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/assertj/ApplicationContextAssertProviderTests.java

@@ -178,7 +178,7 @@ class ApplicationContextAssertProviderTests {
 	void toStringWhenContextFailsToStartShouldReturnSimpleString() {
 		ApplicationContextAssertProvider<ApplicationContext> context = get(this.startupFailureSupplier);
 		assertThat(context.toString()).isEqualTo("Unstarted application context "
-				+ "org.springframework.context.ApplicationContext" + "[startupFailure=java.lang.RuntimeException]");
+				+ "org.springframework.context.ApplicationContext[startupFailure=java.lang.RuntimeException]");
 	}
 
 	@Test

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/bootstrap/SpringBootTestContextBootstrapperTests.java

@@ -42,7 +42,7 @@ class SpringBootTestContextBootstrapperTests {
 				.isThrownBy(() -> buildTestContext(SpringBootTestNonMockWebEnvironmentAndWebAppConfiguration.class))
 				.withMessageContaining("@WebAppConfiguration should only be used with "
 						+ "@SpringBootTest when @SpringBootTest is configured with a mock web "
-						+ "environment. Please remove @WebAppConfiguration or reconfigure " + "@SpringBootTest.");
+						+ "environment. Please remove @WebAppConfiguration or reconfigure @SpringBootTest.");
 	}
 
 	@Test

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/MockitoPostProcessorTests.java

@@ -49,7 +49,7 @@ class MockitoPostProcessorTests {
 		context.register(MultipleBeans.class);
 		assertThatIllegalStateException().isThrownBy(context::refresh)
 				.withMessageContaining("Unable to register mock bean " + ExampleService.class.getName()
-						+ " expected a single matching bean to replace " + "but found [example1, example2]");
+						+ " expected a single matching bean to replace but found [example1, example2]");
 	}
 
 	@Test
@@ -59,7 +59,7 @@ class MockitoPostProcessorTests {
 		context.register(MultipleQualifiedBeans.class);
 		assertThatIllegalStateException().isThrownBy(context::refresh)
 				.withMessageContaining("Unable to register mock bean " + ExampleService.class.getName()
-						+ " expected a single matching bean to replace " + "but found [example1, example3]");
+						+ " expected a single matching bean to replace but found [example1, example3]");
 	}
 
 	@Test