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Especially in the one-line-style format since only one distribution can be specified per line it may be necessary to have multiple lines for the same URI, if a subset of all available distributions or components at that location is desired. APT will sort the URI list after it has generated a complete set internally, and will collapse multiple references to the same Internet host. For instance, into a single connection, so that it does not inefficiently establish a connection, close it, do some