Update some new tests to changed error messages

src/test/ui/feature-gates/feature-gate-re-rebalance-coherence.stderr

-error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g. `MyStruct<T>`)
+error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g., `MyStruct<T>`)
   --> $DIR/feature-gate-re-rebalance-coherence.rs:10:1
    |
 LL | impl<'a, T:'a, Tab> QueryFragment<Oracle> for BatchInsert<'a, T, Tab> {}

src/test/ui/re_rebalance_coherence/coherence-all-remote.stderr

-error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g. `MyStruct<T>`)
+error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g., `MyStruct<T>`)
   --> $DIR/coherence-all-remote.rs:18:1
    |
 LL | impl<T> Remote1<T> for isize { }

src/test/ui/re_rebalance_coherence/coherence-bigint-param.stderr

-error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g. `MyStruct<T>`)
+error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g., `MyStruct<T>`)
   --> $DIR/coherence-bigint-param.rs:20:1
    |
 LL | impl<T> Remote1<BigInt> for T { }

src/test/ui/re_rebalance_coherence/coherence-cross-crate-conflict.stderr

@@ -7,7 +7,7 @@ LL | impl<A> Foo for A {
    = note: conflicting implementation in crate `trait_impl_conflict`:
            - impl trait_impl_conflict::Foo for isize;
 
-error[E0210]: type parameter `A` must be used as the type parameter for some local type (e.g. `MyStruct<A>`)
+error[E0210]: type parameter `A` must be used as the type parameter for some local type (e.g., `MyStruct<A>`)
   --> $DIR/coherence-cross-crate-conflict.rs:20:1
    |
 LL | impl<A> Foo for A {

src/test/ui/re_rebalance_coherence/coherence-lone-type-parameter.stderr

-error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g. `MyStruct<T>`)
+error[E0210]: type parameter `T` must be used as the type parameter for some local type (e.g., `MyStruct<T>`)
   --> $DIR/coherence-lone-type-parameter.rs:18:1
    |
 LL | impl<T> Remote for T { }