Applicability adjustment per additional comments

Author: vi

clippy_lints/src/large_enum_variant.rs

@@ -102,7 +102,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LargeEnumVariant {
                                         "consider boxing the large fields to reduce the total size of the \
                                          enum",
                                         format!("Box<{}>", snip),
-                                        Applicability::MachineApplicable,
+                                        Applicability::Unspecified,
                                     );
                                     return;
                                 }

clippy_lints/src/let_if_seq.rs

@@ -125,7 +125,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LetIfSeq {
                                                 span,
                                                 "it is more idiomatic to write",
                                                 sug,
-                                                Applicability::MaybeIncorrect,
+                                                Applicability::HasPlaceholders,
                                             );
                                            if !mutability.is_empty() {
                                                db.note("you might not need `mut` at all");

clippy_lints/src/matches.rs

@@ -344,7 +344,7 @@ fn check_match_bool(cx: &LateContext<'_, '_>, ex: &Expr, arms: &[Arm], expr: &Ex
                                 expr.span,
                                 "consider using an if/else expression",
                                 sugg,
-                                Applicability::MaybeIncorrect, // not sure
+                                Applicability::HasPlaceholders,
                             );
                         }
                     }