Consistently default operator Rhs/RHS to Self

Operator traits seem to be inconsistent regarding the right hand side
generic. Most default Rhs/RHS to Self, but a few omit this. This patch
modifies them all to default to Self. This should not have any backwards
compatibility issues because we are only enabling code that previously
wouldn't compile.

src/libcore/ops/bit.rs

@@ -370,7 +370,7 @@ bitxor_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_on_unimplemented(message="no implementation for `{Self} << {RHS}`",
                          label="no implementation for `{Self} << {RHS}`")]
-pub trait Shl<RHS> {
+pub trait Shl<RHS=Self> {
     /// The resulting type after applying the `<<` operator.
     #[stable(feature = "rust1", since = "1.0.0")]
     type Output;
@@ -472,7 +472,7 @@ shl_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 isize i128 }
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_on_unimplemented(message="no implementation for `{Self} >> {RHS}`",
                          label="no implementation for `{Self} >> {RHS}`")]
-pub trait Shr<RHS> {
+pub trait Shr<RHS=Self> {
     /// The resulting type after applying the `>>` operator.
     #[stable(feature = "rust1", since = "1.0.0")]
     type Output;
@@ -728,7 +728,7 @@ bitxor_assign_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
 #[stable(feature = "op_assign_traits", since = "1.8.0")]
 #[rustc_on_unimplemented(message="no implementation for `{Self} <<= {Rhs}`",
                          label="no implementation for `{Self} <<= {Rhs}`")]
-pub trait ShlAssign<Rhs> {
+pub trait ShlAssign<Rhs=Self> {
     /// Performs the `<<=` operation.
     #[stable(feature = "op_assign_traits", since = "1.8.0")]
     fn shl_assign(&mut self, rhs: Rhs);