Rollup merge of rust-lang#49166 - dileepbapat:pr-49133, r=nikomatsakis

rust-lang#49133 - Reworded the Error message: "`pub` not needed here" message

Author: kennytm

src/librustc_passes/ast_validation.rs

@@ -67,7 +67,7 @@ impl<'a> AstValidator<'a> {
                                            E0449,
                                            "unnecessary visibility qualifier");
             if vis.node == VisibilityKind::Public {
-                err.span_label(vis.span, "`pub` not needed here");
+                err.span_label(vis.span, "`pub` not permitted here because it's implied");
             }
             if let Some(note) = note {
                 err.note(note);

src/test/ui/error-codes/E0449.stderr

@@ -2,21 +2,21 @@ error[E0449]: unnecessary visibility qualifier
   --> $DIR/E0449.rs:17:1
    |
 LL | pub impl Bar {} //~ ERROR E0449
-   | ^^^ `pub` not needed here
+   | ^^^ `pub` not permitted here because it's implied
    |
    = note: place qualifiers on individual impl items instead
 
 error[E0449]: unnecessary visibility qualifier
   --> $DIR/E0449.rs:19:1
    |
 LL | pub impl Foo for Bar { //~ ERROR E0449
-   | ^^^ `pub` not needed here
+   | ^^^ `pub` not permitted here because it's implied
 
 error[E0449]: unnecessary visibility qualifier
   --> $DIR/E0449.rs:20:5
    |
 LL |     pub fn foo() {} //~ ERROR E0449
-   |     ^^^ `pub` not needed here
+   |     ^^^ `pub` not permitted here because it's implied
 
 error: aborting due to 3 previous errors