{{alias}}( x, n, writable )
    Returns an array with a specified number of appended singleton dimensions.

    Parameters
    ----------
    x: ndarray
        Input array.

    n: integer
        Number of singleton dimensions to append.

    writable: boolean
        Boolean indicating whether a returned array should be writable.

    Returns
    -------
    out: ndarray
        Output array.

    Examples
    --------
    > var x = {{alias:@stdlib/ndarray/array}}( [ [ 1, 2 ], [ 3, 4 ] ] )
    <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]
    > var y = {{alias}}( x, 1, false )
    <ndarray>[ [ [ 1 ], [ 2 ] ], [ [ 3 ], [ 4 ] ] ]

    See Also
    --------