`use`s aren't block-formatted

[strega-nil]

With the src/lib.rs

use self::unicode_normalization::{UnicodeNormalization, Recompositions};

and the rustfmt.toml

max_width = 70
reorder_imports = true
reorder_imports_in_group = true
tab_spaces = 2
struct_variant_width = 0
write_mode = "Overwrite"

cargo fmt leaves:

use self::unicode_normalization::{UnicodeNormalization,
                                  Recompositions};