RegEx Whitespace Vs. Eclipse

Powered[s]*[bB]y.*MyBB

"Powered[\s]*[bB]y.*MyBB"

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.junit.Assert;
import org.junit.Test;


public class RegexTest {
    @Test
    public void testPatternWithWhiteSpace(){
    	Pattern pattern = Pattern.compile("Powered\s*[bB]y.*MyBB");
    	Matcher matcher = pattern.matcher("Powered     By     MyBB");
    	Assert.assertTrue(matcher.matches());
    	matcher = pattern.matcher("Powered_By     MyBB");
    	Assert.assertFalse(matcher.matches());
    }
}

matcher = pattern.matcher("Poweredtnr By     MyBB");
    	Assert.assertTrue(matcher.matches());
    	matcher = pattern.matcher("Poweredtnr ,By     MyBB");
    	Assert.assertFalse(matcher.matches());