list to string

[roadrage]

"""
Create a function called list2str, that takes two arguments - a list of
strings L, and a delimeter D. The function must:
  1. Return a single string, containing all of the input strings joined together
  with D as a delimeter between them. The result should not start or end with
  the delimeter D - D should be used only between the substrings.
  2. When inspected, would return the following help string:
    Join the list L using the delimeter D


For example:
  list2str( ['a','b','c'], ',') -> 'a,b,c'
  list2str('We','are','the','location','cloud','.') -> 'We are the location cloud.'
"""