* include/bits/slice_array.h
        (slice_array<T>::operator=(const T&)): Constify.
        * include/bits/gslice_array.h
        (gslice_array<T>::operator=(const T&)):  Likewise.
        * include/bits/mask_array.h
        (mask_array<T>::operator=(const T&)): Likewise.
        * include/bits/indirect_array.h
        (indirect_array<T>::operator=(const T&): Likewise.
:w

From-SVN: r55577