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Defines the class RCS, which represents a directory with rcs version
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�Zd�Zd�Zd�Zd�Zd�Zddd�Zd�Zd�Zd�Zdd�Zd�Zd�ZRS(s7RCS interface class (local filesystem version).

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cCs9|r$|d�}t||�}n|}|j�|S(s�INTERNAL: Return a sorted copy of the given list of FILES.

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