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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_long_description():
 """Return this projects description."""

    with open("README.rst", "r") as f:
        readme = f.read()
    with open("CHANGELOG.rst", "r") as f:
        changelog = f.read()
        changelog = changelog.replace("\nUnreleased\n------------------", "")
    return "\n".join([readme, changelog])