KOANS About Strings

* test_use_backslash_for_those_hard_cases
  include syntax quotes in strings
* test_use_flexible_quoting_to_handle_really_hard_cases
  use flexible quotes for hard cases such as sentencees
  with to many string cases to track
* test_flexible_quotes_can_handle_multiple_lines
  great for breakouts in text editor, easier to track
* test_here_documents_can_also_handle_multiple_lines
  not sure what a document is? but it acts in the
  same manner is a flexible quote
* test_plus_will_concatenate_two_strings
  += add two strings
* test_plus_concatenation_will_leave_the_original_strings_unmodified
  += original string is not affected
* test_plus_equals_will_concatenate_to_the_end_of_a_string
  adds string to end of string
* test_plus_equals_also_will_leave_the_original_string_unmodified
  original string not affected
* test_the_shovel_operator_will_also_append_content_to_a_string
* test_the_shovel_operator_modifies_the_original_string
  << will affect the original string, it attaches it self to variable
  while += attaches it self to the string 
* test_double_quoted_string_interpret_escape_characters
* test_single_quoted_string_do_not_interpret_escape_characters
* test_single_quotes_sometimes_interpret_escape_characters
* test_double_quoted_strings_interpolate_variables
* test_single_quoted_strings_do_not_interpolate
* test_any_ruby_expression_may_be_interpolated
* test_you_can_get_a_substring_from_a_string
* test_you_can_get_a_single_character_from_a_string
* test_strings_can_be_split
  treats it like an array, space is default spilt pattern
* test_strings_can_be_split_with_different_patterns
  split using symboles
* test_strings_can_be_joined
  joined but remains a string not array 
* test_strings_are_unique_objects