Polish

Closes gh-16094

Author: izeye

spring-boot-project/spring-boot-docs/src/main/asciidoc/using-spring-boot.adoc

@@ -767,7 +767,7 @@ special classloader, then it is considered a "`production application`". If that
 apply to you (i.e. if you run your application from a container), consider excluding
 devtools or set the `-Dspring.devtools.restart.enabled=false` system property.
 
-TIP: Flagging the dependency as optional in Maven or using a custom`developmentOnly`
+TIP: Flagging the dependency as optional in Maven or using a custom `developmentOnly`
 configuration in Gradle  (as shown above) is a best practice that prevents devtools from
 being transitively applied to other modules that use your project.
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/logging/logback/LogbackLoggingSystemTests.java

@@ -471,7 +471,7 @@ public void testTotalSizeCapPropertyWithBytesValue() {
 		testTotalSizeCapProperty(String.valueOf(10 * 1024 * 1024), "10 MB");
 	}
 
-	private void testTotalSizeCapProperty(String sizeValue, String expectFileSize) {
+	private void testTotalSizeCapProperty(String sizeValue, String expectedFileSize) {
 		MockEnvironment environment = new MockEnvironment();
 		environment.setProperty("logging.file.total-size-cap", sizeValue);
 		LoggingInitializationContext loggingInitializationContext = new LoggingInitializationContext(
@@ -482,7 +482,7 @@ private void testTotalSizeCapProperty(String sizeValue, String expectFileSize) {
 		this.logger.info("Hello world");
 		assertThat(getLineWithText(file, "Hello world")).contains("INFO");
 		assertThat(ReflectionTestUtils.getField(getRollingPolicy(), "totalSizeCap")
-				.toString()).isEqualTo(expectFileSize);
+				.toString()).isEqualTo(expectedFileSize);
 	}
 
 	@Test