Always generate Arbitrary instances, not just with cfg(test)

src/lib.rs

@@ -1,4 +1,3 @@
-#[cfg(test)]
 #[macro_use]
 extern crate quickcheck;
 extern crate rand;

src/signed/base.rs

@@ -93,7 +93,6 @@ macro_rules! signed_impls {
             }
         }
 
-        #[cfg(test)]
         impl Arbitrary for $sname {
             fn arbitrary<G>(g: &mut G) -> $sname
               where G: Gen

src/signed/mod.rs

@@ -34,7 +34,6 @@ mod shift;
 #[macro_use]
 mod subtraction;
 
-#[cfg(test)]
 use quickcheck::{Arbitrary,Gen};
 use std::cmp::{Ord,Ordering,PartialOrd};
 use std::fmt;

src/unsigned/base.rs

@@ -64,7 +64,6 @@ macro_rules! generate_base
             }
         }
 
-        #[cfg(test)]
         impl Arbitrary for $name {
             fn arbitrary<G: Gen>(g: &mut G) -> $name {
                 let mut res = $name::zero();

src/unsigned/mod.rs

@@ -87,7 +87,6 @@ use std::ops::{Rem,RemAssign};
 use std::ops::{Shl,ShlAssign,Shr,ShrAssign};
 use std::ops::{Sub,SubAssign};
 
-#[cfg(test)]
 use quickcheck::{Arbitrary,Gen};
 
 macro_rules! base_impls