Update instructions.md for squeaky-clean

Author: jagdish-15

exercises/concept/squeaky-clean/.docs/instructions.md

@@ -29,11 +29,14 @@ SqueakyClean.clean("a-bc");
 ## 3. Convert leetspeak to normal text
 
 Modify the (_static_) `SqueakyClean.clean()` method to convert [leetspeak][leet-speak] to normal text.
+
 For simplicity we will only be using `4`, `3`, `0`, `1` and `7` from the table.
 
 ```java
 SqueakyClean.clean("H3ll0 W0rld");
 // => "Hello_World"
+SqueakyClean.clean("4 73s7");
+// => "a_test"
 ```
 
 ## 4. Omit characters that are not letters

exercises/concept/squeaky-clean/.meta/config.json

@@ -4,7 +4,8 @@
   ],
   "contributors": [
     "sanderploegsma",
-    "manumafe98"
+    "manumafe98",
+    "jagdishdrp"
   ],
   "files": {
     "solution": [