fix solution

Python/Module2_EssentialsOfPython/Problems/EncodeAsString.md

@@ -96,6 +96,8 @@ is equivalent to the long-form code:
 out = ""
 for x in some_iterable_of_strings:
     out += "<hi>" + x
+
+out = out.lstrip("<hi>")  # get rid of the extra leading "<hi>"
 ``` 
 
 `int_to_str` plays a clever trick to convert each integer, digit-by-digit, into its string form - it calls `str` on the integer. This converts the integer into a string, which is a [sequence](https://www.pythonlikeyoumeanit.com/Module2_EssentialsOfPython/SequenceTypes.html). This permits us to access each digit of the integer and even iterate over them: