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Remove this > behaviour. > > This allows specifying a real capacity of 0, which was not previously > possible. This breaks `grow_request` in this case, so change it to grow > to at least `BitmapVec::MAX_INLINE_LEN`, mirroring the capacity floor in > `shrink_request`. > > Reviewed-by: Alice Ryhl > Reviewed-by: Burak Emir > Signed-off-by: Eliot Courtney Reviewed-by: Alexandre Courbot