style: format code with Google Java Format

This commit fixes the style issues introduced in b6a0c13 according to the output
from Google Java Format.

Details: #135

src/main/java/online/hatsunemiku/tachideskvaadinui/data/tachidesk/Chapter.java

@@ -79,8 +79,10 @@ public String toString() {
 
   /**
    * Compares this chapter to another chapter based on the chapter number.
+   *
    * @param o the object to be compared.
-   * @return a negative integer, zero, or a positive integer as this chapter is less than, equal to, or greater than the specified chapter.
+   * @return a negative integer, zero, or a positive integer as this chapter is less than, equal to,
+   *     or greater than the specified chapter.
    */
   @Override
   public int compareTo(@NotNull Chapter o) {

src/main/java/online/hatsunemiku/tachideskvaadinui/services/MangaService.java

@@ -82,8 +82,8 @@ public boolean removeMangaFromLibrary(int mangaId) {
 
   /**
    * Retrieves the cached list of chapters for a manga. This method does NOT find new chapters. Use
-   * {@link #fetchChapterList(int)} to find new chapters.
-   * This method also sorts the chapters by chapter number in ascending order.
+   * {@link #fetchChapterList(int)} to find new chapters. This method also sorts the chapters by
+   * chapter number in ascending order.
    *
    * @param mangaId the ID of the manga for which to get the chapter list
    * @return the list of Chapter objects representing the chapters of the manga