fix(move_semantics2): clarify referencing
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@ -300,7 +300,7 @@ There's a few ways to fix this, try them all if you want:
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2. Make `fill_vec` borrow its argument instead of taking ownership of it,
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and then copy the data within the function in order to return an owned
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`Vec<i32>`
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3. Make `fill_vec` *mutably* borrow its argument (which will need to be
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3. Make `fill_vec` *mutably* borrow a reference to its argument (which will need to be
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mutable), modify it directly, then not return anything. Then you can get rid
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of `vec1` entirely -- note that this will change what gets printed by the
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first `println!`"""
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