Account for typo in turbofish and suggest ::

src/test/ui/suggestions/type-ascription-instead-of-path-2.stderr

@@ -4,7 +4,7 @@ error: expected `::`, found `(`
 LL |     vec![Ok(2)].into_iter().collect:<Result<Vec<_>,_>>()?;
    |                                    -                  ^ expected `::`
    |                                    |
-   |                                    tried to parse a type due to this type ascription
+   |                                    help: maybe write a path separator here: `::`
    |
    = note: `#![feature(type_ascription)]` lets you annotate an expression with a type: `<expr>: <type>`
    = note: for more information, see https://github.com/rust-lang/rust/issues/23416