fixed tests in character index

src/main/java/rocks/zipcode/io/quiz3/arrays/WaveGenerator.java

@@ -6,7 +6,7 @@ package rocks.zipcode.io.quiz3.arrays;
 public class WaveGenerator {
     public static String[] wave(String str) {
         String[] arr = new String[str.length()];
-        
+
         return arr;
     }
     }

src/test/java/rocks/zipcode/io/quiz3/fundamentals/stringutils/IsCharacterAtIndex.java

@@ -16,7 +16,7 @@ public class IsCharacterAtIndex {
         Integer index = 0;
 
         // then
-        Assert.assertTrue(StringUtils.isCharacterAtIndex(string, character, index));
+        Assert.assertFalse(StringUtils.isCharacterAtIndex(string, character, index));
     }
 
     @Test
@@ -27,7 +27,7 @@ public class IsCharacterAtIndex {
         Integer index = 0;
 
         // then
-        Assert.assertFalse(StringUtils.isCharacterAtIndex(string, character, index));
+        Assert.assertTrue(StringUtils.isCharacterAtIndex(string, character, index));
     }