Make : -> = typo suggestion verbose

compiler/rustc_parse/src/parser/stmt.rs

@@ -362,7 +362,7 @@ fn parse_local(&mut self, super_: Option<Span>, attrs: AttrVec) -> PResult<'a, B
                 // init parsed, ty error
                 // Could parse the type as if it were the initializer, it is likely there was a
                 // typo in the code: `:` instead of `=`. Add suggestion and emit the error.
-                err.span_suggestion_short(
+                err.span_suggestion_verbose(
                     colon_sp,
                     "use `=` if you meant to assign",
                     " =",
@@ -1134,7 +1134,7 @@ pub fn parse_full_stmt(
                                     false
                                 };
                                 if suggest_eq {
-                                    e.span_suggestion_short(
+                                    e.span_suggestion_verbose(
                                         colon_sp,
                                         "use `=` if you meant to assign",
                                         "=",

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -1271,7 +1271,7 @@ fn suggest_typo(
                 Some((pat_sp, Some(ty_sp), None))
                     if ty_sp.contains(base_error.span) && base_error.could_be_expr =>
                 {
-                    err.span_suggestion_short(
+                    err.span_suggestion_verbose(
                         pat_sp.between(ty_sp),
                         "use `=` if you meant to assign",
                         " = ",

tests/ui/parser/recover/array-type-no-semi.stderr

@@ -17,7 +17,12 @@ LL |     let a: [i32, ];
    |          -     ^ expected `;` or `]`
    |          |
    |          while parsing the type for `a`
-   |          help: use `=` if you meant to assign
+   |
+help: use `=` if you meant to assign
+   |
+LL -     let a: [i32, ];
+LL +     let a = [i32, ];
+   |
 
 error: expected `;` or `]`, found `,`
   --> $DIR/array-type-no-semi.rs:12:16

tests/ui/parser/recover/recover-colon-instead-of-eq-in-local.stderr

@@ -13,7 +13,12 @@ LL |     let _: std::env::temp_dir().join("foo");
    |          -                     ^ expected one of `!`, `+`, `->`, `::`, `;`, or `=`
    |          |
    |          while parsing the type for `_`
-   |          help: use `=` if you meant to assign
+   |
+help: use `=` if you meant to assign
+   |
+LL -     let _: std::env::temp_dir().join("foo");
+LL +     let _= std::env::temp_dir().join("foo");
+   |
 
 error: aborting due to 2 previous errors
 

tests/ui/suggestions/let-binding-init-expr-as-ty.stderr

@@ -2,9 +2,13 @@ error[E0573]: expected type, found local variable `num`
   --> $DIR/let-binding-init-expr-as-ty.rs:2:27
    |
 LL |     let foo: i32::from_be(num);
-   |            --             ^^^ not a type
-   |            |
-   |            help: use `=` if you meant to assign
+   |                           ^^^ not a type
+   |
+help: use `=` if you meant to assign
+   |
+LL -     let foo: i32::from_be(num);
+LL +     let foo = i32::from_be(num);
+   |
 
 error: argument types not allowed with return type notation
   --> $DIR/let-binding-init-expr-as-ty.rs:2:26

tests/ui/type/type-ascription-instead-of-initializer.stderr

@@ -5,7 +5,12 @@ LL |     let x: Vec::with_capacity(10, 20);
    |          -                    ^^ expected type
    |          |
    |          while parsing the type for `x`
-   |          help: use `=` if you meant to assign
+   |
+help: use `=` if you meant to assign
+   |
+LL -     let x: Vec::with_capacity(10, 20);
+LL +     let x = Vec::with_capacity(10, 20);
+   |
 
 error[E0061]: this function takes 1 argument but 2 arguments were supplied
   --> $DIR/type-ascription-instead-of-initializer.rs:2:12