improve const fn RepeatVec diagnostics

Author: henryboisdequin

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs

@@ -1908,15 +1908,15 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
 
                 if is_const_fn {
                     err.help(
-                        "consider creating a new `const` item and initializing with the result \
+                        "consider creating a new `const` item and initializing it with the result \
                         of the function call to be used in the repeat position, like \
                         `const VAL: Type = const_fn();` and `let x = [VAL; 42];`",
                     );
                 }
 
                 if self.tcx.sess.is_nightly_build() && is_const_fn {
                     err.help(
-                        "create an inline `const` block, see PR \
+                        "create an inline `const` block, see RFC \
                         #2920 <https://github.com/rust-lang/rfcs/pull/2920> \
                         for more information",
                     );

src/test/ui/consts/const-blocks/fn-call-in-non-const.stderr

@@ -7,8 +7,8 @@ LL |     let _: [Option<Bar>; 2] = [no_copy(); 2];
    = help: the following implementations were found:
              <Option<T> as Copy>
    = note: the `Copy` trait is required because the repeated element will be copied
-   = help: consider creating a new `const` item and initializing with the result of the function call to be used in the repeat position, like `const VAL: Type = const_fn();` and `let x = [VAL; 42];`
-   = help: create an inline `const` block, see PR #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
+   = help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position, like `const VAL: Type = const_fn();` and `let x = [VAL; 42];`
+   = help: create an inline `const` block, see RFC #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
 
 error: aborting due to previous error
 

src/test/ui/consts/const-fn-in-vec.stderr

@@ -5,8 +5,8 @@ LL |     let strings: [String; 5] = [String::new(); 5];
    |                                ^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `String`
    |
    = note: the `Copy` trait is required because the repeated element will be copied
-   = help: consider creating a new `const` item and initializing with the result of the function call to be used in the repeat position, like `const VAL: Type = const_fn();` and `let x = [VAL; 42];`
-   = help: create an inline `const` block, see PR #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
+   = help: consider creating a new `const` item and initializing it with the result of the function call to be used in the repeat position, like `const VAL: Type = const_fn();` and `let x = [VAL; 42];`
+   = help: create an inline `const` block, see RFC #2920 <https://github.com/rust-lang/rfcs/pull/2920> for more information
 
 error: aborting due to previous error