diff --git a/src/librand/chacha.rs b/src/librand/chacha.rs
index cd099c69005f3..5fba44a1c38f1 100644
--- a/src/librand/chacha.rs
+++ b/src/librand/chacha.rs
@@ -10,7 +10,7 @@
 
 //! The ChaCha random number generator.
 
-use {Rng, SeedableRng, Rand};
+use {Rand, Rng, SeedableRng};
 
 const KEY_WORDS: usize = 8; // 8 words for the 256-bit key
 const STATE_WORDS: usize = 16;
@@ -216,7 +216,8 @@ mod tests {
         let s = ::test::rng().gen_iter::<u32>().take(8).collect::<Vec<u32>>();
         let mut ra: ChaChaRng = SeedableRng::from_seed(&*s);
         let mut rb: ChaChaRng = SeedableRng::from_seed(&*s);
-        assert!(ra.gen_ascii_chars().take(100)
+        assert!(ra.gen_ascii_chars()
+                  .take(100)
                   .eq(rb.gen_ascii_chars().take(100)));
     }
 
@@ -225,7 +226,8 @@ mod tests {
         let seed: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7];
         let mut ra: ChaChaRng = SeedableRng::from_seed(seed);
         let mut rb: ChaChaRng = SeedableRng::from_seed(seed);
-        assert!(ra.gen_ascii_chars().take(100)
+        assert!(ra.gen_ascii_chars()
+                  .take(100)
                   .eq(rb.gen_ascii_chars().take(100)));
     }
 
diff --git a/src/librand/distributions/exponential.rs b/src/librand/distributions/exponential.rs
index 12dbbfdb0ed4d..5a8558efc0244 100644
--- a/src/librand/distributions/exponential.rs
+++ b/src/librand/distributions/exponential.rs
@@ -13,8 +13,8 @@
 #[cfg(not(test))] // only necessary for no_std
 use FloatMath;
 
-use {Rng, Rand};
-use distributions::{ziggurat, ziggurat_tables, Sample, IndependentSample};
+use {Rand, Rng};
+use distributions::{IndependentSample, Sample, ziggurat, ziggurat_tables};
 
 /// A wrapper around an `f64` to generate Exp(1) random numbers.
 ///
@@ -88,7 +88,7 @@ impl IndependentSample<f64> for Exp {
 
 #[cfg(test)]
 mod tests {
-    use distributions::{Sample, IndependentSample};
+    use distributions::{IndependentSample, Sample};
     use super::Exp;
 
     #[test]
diff --git a/src/librand/distributions/gamma.rs b/src/librand/distributions/gamma.rs
index cf48823656044..9ca13e85b5333 100644
--- a/src/librand/distributions/gamma.rs
+++ b/src/librand/distributions/gamma.rs
@@ -16,9 +16,9 @@ use self::ChiSquaredRepr::*;
 #[cfg(not(test))] // only necessary for no_std
 use FloatMath;
 
-use {Rng, Open01};
+use {Open01, Rng};
 use super::normal::StandardNormal;
-use super::{IndependentSample, Sample, Exp};
+use super::{Exp, IndependentSample, Sample};
 
 /// The Gamma distribution `Gamma(shape, scale)` distribution.
 ///
@@ -291,8 +291,8 @@ impl IndependentSample<f64> for StudentT {
 
 #[cfg(test)]
 mod tests {
-    use distributions::{Sample, IndependentSample};
-    use super::{ChiSquared, StudentT, FisherF};
+    use distributions::{IndependentSample, Sample};
+    use super::{ChiSquared, FisherF, StudentT};
 
     #[test]
     fn test_chi_squared_one() {
diff --git a/src/librand/distributions/mod.rs b/src/librand/distributions/mod.rs
index 2557d39c550f5..36c9f783ff5e0 100644
--- a/src/librand/distributions/mod.rs
+++ b/src/librand/distributions/mod.rs
@@ -22,11 +22,11 @@ use core::num::Float;
 
 use core::marker::PhantomData;
 
-use {Rng, Rand};
+use {Rand, Rng};
 
 pub use self::range::Range;
-pub use self::gamma::{Gamma, ChiSquared, FisherF, StudentT};
-pub use self::normal::{Normal, LogNormal};
+pub use self::gamma::{ChiSquared, FisherF, Gamma, StudentT};
+pub use self::normal::{LogNormal, Normal};
 pub use self::exponential::Exp;
 
 pub mod range;
@@ -266,8 +266,8 @@ fn ziggurat<R: Rng, P, Z>(rng: &mut R,
 
 #[cfg(test)]
 mod tests {
-    use {Rng, Rand};
-    use super::{RandSample, WeightedChoice, Weighted, Sample, IndependentSample};
+    use {Rand, Rng};
+    use super::{IndependentSample, RandSample, Sample, Weighted, WeightedChoice};
 
     #[derive(PartialEq, Debug)]
     struct ConstRand(usize);
diff --git a/src/librand/distributions/normal.rs b/src/librand/distributions/normal.rs
index 86840c568e018..811d5b14c7112 100644
--- a/src/librand/distributions/normal.rs
+++ b/src/librand/distributions/normal.rs
@@ -13,8 +13,8 @@
 #[cfg(not(test))] // only necessary for no_std
 use FloatMath;
 
-use {Rng, Rand, Open01};
-use distributions::{ziggurat, ziggurat_tables, Sample, IndependentSample};
+use {Open01, Rand, Rng};
+use distributions::{IndependentSample, Sample, ziggurat, ziggurat_tables};
 
 /// A wrapper around an `f64` to generate N(0, 1) random numbers
 /// (a.k.a.  a standard normal, or Gaussian).
@@ -145,8 +145,8 @@ impl IndependentSample<f64> for LogNormal {
 
 #[cfg(test)]
 mod tests {
-    use distributions::{Sample, IndependentSample};
-    use super::{Normal, LogNormal};
+    use distributions::{IndependentSample, Sample};
+    use super::{LogNormal, Normal};
 
     #[test]
     fn test_normal() {
diff --git a/src/librand/distributions/range.rs b/src/librand/distributions/range.rs
index f94ef059dae8f..ba8554a979b89 100644
--- a/src/librand/distributions/range.rs
+++ b/src/librand/distributions/range.rs
@@ -14,7 +14,7 @@
 
 use core::marker::Sized;
 use Rng;
-use distributions::{Sample, IndependentSample};
+use distributions::{IndependentSample, Sample};
 
 /// Sample values uniformly between two bounds.
 ///
@@ -148,7 +148,7 @@ float_impl! { f64 }
 
 #[cfg(test)]
 mod tests {
-    use distributions::{Sample, IndependentSample};
+    use distributions::{IndependentSample, Sample};
     use super::Range;
 
     #[should_panic]
diff --git a/src/librand/isaac.rs b/src/librand/isaac.rs
index 28eff87bde3b7..e8cc7b5cc2dac 100644
--- a/src/librand/isaac.rs
+++ b/src/librand/isaac.rs
@@ -16,7 +16,7 @@ use core::slice;
 use core::iter::repeat;
 use core::num::Wrapping as w;
 
-use {Rng, SeedableRng, Rand};
+use {Rand, Rng, SeedableRng};
 
 type w32 = w<u32>;
 type w64 = w<u64>;
@@ -591,14 +591,15 @@ mod tests {
     use std::prelude::v1::*;
 
     use {Rng, SeedableRng};
-    use super::{IsaacRng, Isaac64Rng};
+    use super::{Isaac64Rng, IsaacRng};
 
     #[test]
     fn test_rng_32_rand_seeded() {
         let s = ::test::rng().gen_iter::<u32>().take(256).collect::<Vec<u32>>();
         let mut ra: IsaacRng = SeedableRng::from_seed(&s[..]);
         let mut rb: IsaacRng = SeedableRng::from_seed(&s[..]);
-        assert!(ra.gen_ascii_chars().take(100)
+        assert!(ra.gen_ascii_chars()
+                  .take(100)
                   .eq(rb.gen_ascii_chars().take(100)));
     }
     #[test]
@@ -606,7 +607,8 @@ mod tests {
         let s = ::test::rng().gen_iter::<u64>().take(256).collect::<Vec<u64>>();
         let mut ra: Isaac64Rng = SeedableRng::from_seed(&s[..]);
         let mut rb: Isaac64Rng = SeedableRng::from_seed(&s[..]);
-        assert!(ra.gen_ascii_chars().take(100)
+        assert!(ra.gen_ascii_chars()
+                  .take(100)
                   .eq(rb.gen_ascii_chars().take(100)));
     }
 
@@ -615,7 +617,8 @@ mod tests {
         let seed: &[_] = &[1, 23, 456, 7890, 12345];
         let mut ra: IsaacRng = SeedableRng::from_seed(seed);
         let mut rb: IsaacRng = SeedableRng::from_seed(seed);
-        assert!(ra.gen_ascii_chars().take(100)
+        assert!(ra.gen_ascii_chars()
+                  .take(100)
                   .eq(rb.gen_ascii_chars().take(100)));
     }
     #[test]
@@ -623,7 +626,8 @@ mod tests {
         let seed: &[_] = &[1, 23, 456, 7890, 12345];
         let mut ra: Isaac64Rng = SeedableRng::from_seed(seed);
         let mut rb: Isaac64Rng = SeedableRng::from_seed(seed);
-        assert!(ra.gen_ascii_chars().take(100)
+        assert!(ra.gen_ascii_chars()
+                  .take(100)
                   .eq(rb.gen_ascii_chars().take(100)));
     }
 
diff --git a/src/librand/lib.rs b/src/librand/lib.rs
index d8517fb4c5714..c31a0ed53207d 100644
--- a/src/librand/lib.rs
+++ b/src/librand/lib.rs
@@ -47,10 +47,10 @@ use core::f64;
 use core::intrinsics;
 use core::marker::PhantomData;
 
-pub use isaac::{IsaacRng, Isaac64Rng};
+pub use isaac::{Isaac64Rng, IsaacRng};
 pub use chacha::ChaChaRng;
 
-use distributions::{Range, IndependentSample};
+use distributions::{IndependentSample, Range};
 use distributions::range::SampleRange;
 
 #[cfg(test)]
@@ -67,7 +67,7 @@ mod rand_impls;
 // depend on libstd.  This will go away when librand is integrated
 // into libstd.
 #[doc(hidden)]
-trait FloatMath : Sized {
+trait FloatMath: Sized {
     fn exp(self) -> Self;
     fn ln(self) -> Self;
     fn sqrt(self) -> Self;
@@ -102,14 +102,14 @@ impl FloatMath for f64 {
 
 /// A type that can be randomly generated using an `Rng`.
 #[doc(hidden)]
-pub trait Rand : Sized {
+pub trait Rand: Sized {
     /// Generates a random instance of this type using the specified source of
     /// randomness.
     fn rand<R: Rng>(rng: &mut R) -> Self;
 }
 
 /// A random number generator.
-pub trait Rng : Sized {
+pub trait Rng: Sized {
     /// Return the next random u32.
     ///
     /// This rarely needs to be called directly, prefer `r.gen()` to
diff --git a/src/librand/reseeding.rs b/src/librand/reseeding.rs
index db5e0213726d9..c7d560eb1f8e2 100644
--- a/src/librand/reseeding.rs
+++ b/src/librand/reseeding.rs
@@ -83,8 +83,8 @@ impl<S, R: SeedableRng<S>, Rsdr: Reseeder<R> + Default>
         self.bytes_generated = 0;
     }
 
-    /// Create a new `ReseedingRng` from the given reseeder and
-    /// seed. This uses a default value for `generation_threshold`.
+/// Create a new `ReseedingRng` from the given reseeder and
+/// seed. This uses a default value for `generation_threshold`.
     fn from_seed((rsdr, seed): (Rsdr, S)) -> ReseedingRng<R, Rsdr> {
         ReseedingRng {
             rng: SeedableRng::from_seed(seed),
@@ -122,8 +122,8 @@ impl Default for ReseedWithDefault {
 mod tests {
     use std::prelude::v1::*;
 
-    use super::{ReseedingRng, ReseedWithDefault};
-    use {SeedableRng, Rng};
+    use super::{ReseedWithDefault, ReseedingRng};
+    use {Rng, SeedableRng};
 
     struct Counter {
         i: u32,
@@ -166,7 +166,8 @@ mod tests {
     fn test_rng_seeded() {
         let mut ra: MyRng = SeedableRng::from_seed((ReseedWithDefault, 2));
         let mut rb: MyRng = SeedableRng::from_seed((ReseedWithDefault, 2));
-        assert!(ra.gen_ascii_chars().take(100)
+        assert!(ra.gen_ascii_chars()
+                  .take(100)
                   .eq(rb.gen_ascii_chars().take(100)));
     }