Fix the javadoc

By: Thinkofdeath <thinkofdeath@spigotmc.org>

paper-api/src/main/java/org/bukkit/entity/Guardian.java

@@ -4,12 +4,14 @@ public interface Guardian extends Monster {
 
     /**
      * Check if the Guardian is an elder Guardian
+     * 
      * @return true if the Guardian is an Elder Guardian, false if not
      */
     public boolean isElder();
 
     /**
      * Set the Guardian to an elder Guardian or not
+     *
      * @param shouldBeElder True if this Guardian should be a elder Guardian, false if not
      */
     public void setElder(boolean shouldBeElder);

paper-api/src/main/java/org/bukkit/entity/Minecart.java

@@ -130,12 +130,14 @@ public interface Minecart extends Vehicle {
 
     /**
      * Sets the offset of the display block.
-     * @return the current block offset for this minecart.
+     *
+     * @param offset the block offset to set for this minecart.
      */
     public void setDisplayBlockOffset(int offset);
 
     /**
      * Gets the offset of the display block.
+     * 
      * @return the current block offset for this minecart.
      */
     public int getDisplayBlockOffset();