Removing extra space before front matter

I have removed an extra space and new line character before the front matter.

Please make sure, there should be now extra space of new line character before the starting symbol (---) of the front matter, otherwise it will not work.

Author: gauravkukade

_posts/java-string/2019-12-12-java-substring-method.md

@@ -1,11 +1,9 @@
-
 ---
 layout: post
 title: substring() Method in Java (With example)
 author: gaurav
 categories: [ Java, Core Java, String]
 description: The String class in Java is one of the most important classes in Java. After reading this article you will be able to use the 'substring()` method of the String class.
-
 ---
 The String class in Java is one of the most important classes in Java. After reading this article you will be able to use the 'substring()` method of the String class.