modify Find javadoc

Author: nickinhinguyen

src/main/java/command_decorators/Redirection.java

@@ -100,7 +100,7 @@ private String removeError(String result, String error) {
                 lastIndex ++;
             }
             result = result.substring(0, startIndex)
-                    + result.substring(lastIndex, result.length());
+                    + result.substring(lastIndex);
         }
         return result;
 

src/main/java/commands/Find.java

@@ -24,7 +24,7 @@ public Find() {
     /**
      * Searches for the file or directory in a given path
      * @param shellState is the current state of JShell program
-     * @param arguments is the path/s,type and name of file/directory
+     * @param arguments includes all of: [file_path], --type [f/d], --name [file_name]
      * @throws Exception if path, type or name is invalid
      *
      */