fix init --title option failure when git user is not configured

Author: eureka-cpu

src/cmd/init.rs

@@ -74,9 +74,9 @@ pub fn execute(args: &ArgMatches) -> Result<()> {
     if let Some(author) = get_author_name() {
         debug!("Obtained user name from gitconfig: {:?}", author);
         config.book.authors.push(author);
-        builder.with_config(config);
     }
 
+    builder.with_config(config);
     builder.build()?;
     println!("\nAll done, no errors...");
 

tests/cli/init.rs

@@ -43,5 +43,5 @@ fn no_git_config_with_title() {
         .stdout(predicates::str::contains("\nAll done, no errors...\n"));
 
     let config = Config::from_disk(temp.path().join("book.toml")).unwrap();
-    assert_eq!(config.book.title, None);
+    assert_eq!(config.book.title.as_deref(), Some("Example title"));
 }