bless trivial polonius diagnostics changes

Author: lqd

src/test/ui/impl-trait/multiple-lifetimes/error-handling.polonius.stderr

@@ -1,5 +1,5 @@
 error: lifetime may not live long enough
-  --> $DIR/error-handling.rs:23:16
+  --> $DIR/error-handling.rs:22:16
    |
 LL | fn foo<'a, 'b, 'c>(x: &'static i32, mut y: &'a i32) -> E<'b, 'c> {
    |        --  -- lifetime `'b` defined here

src/test/ui/nll/outlives-suggestion-simple.polonius.stderr

@@ -121,3 +121,4 @@ LL |         Bar2::new(&self)
 
 error: aborting due to 10 previous errors
 
+For more information about this error, try `rustc --explain E0521`.

src/test/ui/nll/user-annotations/closure-substs.polonius.stderr

@@ -21,7 +21,7 @@ error: lifetime may not live long enough
   --> $DIR/closure-substs.rs:15:16
    |
 LL |     |x: &i32| -> &'static i32 {
-   |         -        ------------ return type of closure is &'2 i32
+   |         -        - let's call the lifetime of this reference `'2`
    |         |
    |         let's call the lifetime of this reference `'1`
 LL |         return x;
@@ -58,3 +58,4 @@ LL |         b(x);
 
 error: aborting due to 6 previous errors
 
+For more information about this error, try `rustc --explain E0521`.