Merge pull request #40603 from coursar

* pr/40603:
  Polish "Change Spring Boot CLI init command docs default build system to gradle"
  Change Spring Boot CLI init command docs default build system to gradle

Closes gh-40603

spring-boot-project/spring-boot-tools/spring-boot-cli/src/main/java/org/springframework/boot/cli/command/init/InitCommand.java

@@ -165,7 +165,7 @@ public class InitCommand extends OptionParsingCommand {
 			this.packaging = option(Arrays.asList("packaging", "p"), "Project packaging (for example 'jar')")
 				.withRequiredArg();
 			this.build = option("build", "Build system to use (for example 'maven' or 'gradle')").withRequiredArg()
-				.defaultsTo("maven");
+				.defaultsTo("gradle");
 			this.format = option("format", "Format of the generated content (for example 'build' for a build file, "
 					+ "'project' for a project archive)")
 				.withRequiredArg()

spring-boot-project/spring-boot-tools/spring-boot-cli/src/test/java/org/springframework/boot/cli/command/init/InitCommandTests.java

@@ -344,7 +344,7 @@ class InitCommandTests extends AbstractHttpClientMockTests {
 	void parseTypeOnly() throws Exception {
 		this.handler.disableProjectGeneration();
 		this.command.run("-t=ant-project");
-		assertThat(this.handler.lastRequest.getBuild()).isEqualTo("maven");
+		assertThat(this.handler.lastRequest.getBuild()).isEqualTo("gradle");
 		assertThat(this.handler.lastRequest.getFormat()).isEqualTo("project");
 		assertThat(this.handler.lastRequest.isDetectType()).isFalse();
 		assertThat(this.handler.lastRequest.getType()).isEqualTo("ant-project");
@@ -364,7 +364,7 @@ class InitCommandTests extends AbstractHttpClientMockTests {
 	void parseFormatOnly() throws Exception {
 		this.handler.disableProjectGeneration();
 		this.command.run("--format=web");
-		assertThat(this.handler.lastRequest.getBuild()).isEqualTo("maven");
+		assertThat(this.handler.lastRequest.getBuild()).isEqualTo("gradle");
 		assertThat(this.handler.lastRequest.getFormat()).isEqualTo("web");
 		assertThat(this.handler.lastRequest.isDetectType()).isTrue();
 		assertThat(this.handler.lastRequest.getType()).isNull();