test: fix test value

Author: Genyus

exception-handling/src/test/java/com/cbfacademy/ExceptionExercisesTest.java

@@ -110,7 +110,7 @@ void testConvertToIntegerReturnsExpectedResult(String input, Integer expectedRes
             "hello",
             "123abc",
             "''",
-            " "
+            "' '"
     })
     void testConvertToIntegerReturnsZeroForInvalidStrings(String input) {
         Integer result = exceptionExercises.convertToInteger(input);