Use nightly for style check (#396)

* Use nightly for style check

Signed-off-by: Michael X. Grey <[email protected]>

* Install nightly for cargo +nightly fmt

Signed-off-by: Michael X. Grey <[email protected]>

* Fix style in examples

Signed-off-by: Michael X. Grey <[email protected]>

* Update style for rosidl_runtime_rs

Signed-off-by: Michael X. Grey <[email protected]>

* Add a comment indicating that nightly release is needed for formatting

Signed-off-by: Michael X. Grey <[email protected]>

---------

Signed-off-by: Michael X. Grey <[email protected]>

Author: mxgrey

rosidl_runtime_rs/src/sequence.rs

@@ -1,8 +1,10 @@
-use std::cmp::Ordering;
-use std::fmt::{self, Debug, Display};
-use std::hash::{Hash, Hasher};
-use std::iter::{Extend, FromIterator, FusedIterator};
-use std::ops::{Deref, DerefMut};
+use std::{
+    cmp::Ordering,
+    fmt::{self, Debug, Display},
+    hash::{Hash, Hasher},
+    iter::{Extend, FromIterator, FusedIterator},
+    ops::{Deref, DerefMut},
+};
 
 #[cfg(feature = "serde")]
 mod serde;

rosidl_runtime_rs/src/string.rs

@@ -1,14 +1,15 @@
-use std::cmp::Ordering;
-use std::ffi::CStr;
-use std::fmt::{self, Debug, Display};
-use std::hash::{Hash, Hasher};
-use std::ops::{Deref, DerefMut};
+use std::{
+    cmp::Ordering,
+    ffi::CStr,
+    fmt::{self, Debug, Display},
+    hash::{Hash, Hasher},
+    ops::{Deref, DerefMut},
+};
 
 #[cfg(feature = "serde")]
 mod serde;
 
-use crate::sequence::Sequence;
-use crate::traits::SequenceAlloc;
+use crate::{sequence::Sequence, traits::SequenceAlloc};
 
 /// A zero-terminated UTF-8 string.
 ///

rosidl_runtime_rs/src/traits.rs

@@ -15,8 +15,7 @@
 // DISTRIBUTION A. Approved for public release; distribution unlimited.
 // OPSEC #4584.
 //
-use std::borrow::Cow;
-use std::fmt::Debug;
+use std::{borrow::Cow, fmt::Debug};
 
 /// Internal trait that connects a particular `Sequence<T>` instance to generated C functions
 /// that allocate and deallocate memory.