Improve javadoc in 26 files.

Addresses:
BUKKIT-1643, BUKKIT-1868, BUKKIT-1846, BUKKIT-2632, BUKKIT-3196,
BUKKIT-3187, BUKKIT-3198, BUKKIT-3200, BUKKIT-3201 and BUKKIT-3417.

By: feildmaster <admin@feildmaster.com>

paper-api/src/main/java/org/bukkit/material/Crops.java

@@ -35,7 +35,7 @@ public class Crops extends MaterialData {
     /**
      * Gets the current growth state of this crop
      *
-     * @return CropState of this leave
+     * @return CropState of this crop
      */
     public CropState getState() {
         return CropState.getByData(getData());