<gh_stars>10-100
"""Demo assignment with separate test files."""

def square(x):
    """Return x squared."""
    return x * x

def double(x):
    """Return x doubled."""
    return x # Incorrect


"""Demo assignment with separate test files."""

def square(x):
    """Return x squared."""
    return x * x

def double(x):
    """Return x doubled."""
    return x # Incorrect
Demo assignment with separate test files. Return x squared. Return x doubled. # Incorrect