README
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* comparing-strings.py: demonstrates how to compare strings using 
  the == operator

* comparing-strings-case-insensitive.py: compare strings using
  case-insensitive

* comparing-strings-difflib.py: compare multi-line strings using difflib

* comparing-strings-order.py: demonstrates how to compare strings
  according to lexicographical order based on the < and > operators

* comparing-strings-re.py: compare strings using a Regular Expression