Improve error message

Author: pitiK3U

clippy_lints/src/methods/mod.rs

@@ -3883,8 +3883,8 @@ fn lint_from_iter(cx: &LateContext<'_>, expr: &hir::Expr<'_>, args: &[hir::Expr<
             cx,
             FROM_ITER_INSTEAD_OF_COLLECT,
             expr.span,
+            "usage of `FromIterator::from_iter`",
             "use `.collect()` instead of `::from_iter()`",
-            "consider using",
             format!("{}.collect()", iter_expr),
             Applicability::MaybeIncorrect,
         );

tests/ui/from_iter_instead_of_collect.stderr

@@ -1,16 +1,16 @@
-error: use `.collect()` instead of `::from_iter()`
+error: usage of `FromIterator::from_iter`
   --> $DIR/from_iter_instead_of_collect.rs:8:5
    |
 LL |     Vec::from_iter(iter_expr);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `iter_expr.collect()`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `.collect()` instead of `::from_iter()`: `iter_expr.collect()`
    |
    = note: `-D clippy::from-iter-instead-of-collect` implied by `-D warnings`
 
-error: use `.collect()` instead of `::from_iter()`
+error: usage of `FromIterator::from_iter`
   --> $DIR/from_iter_instead_of_collect.rs:10:5
    |
 LL |     HashMap::<usize, &i8>::from_iter(vec![5, 5, 5, 5].iter().enumerate());
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `vec![5, 5, 5, 5].iter().enumerate().collect()`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `.collect()` instead of `::from_iter()`: `vec![5, 5, 5, 5].iter().enumerate().collect()`
 
 error: aborting due to 2 previous errors