warning: unnecessary parentheses around assigned value
  --> $DIR/unused_braces.rs:5:13
   |
LL |     let _ = (7);
   |             ^^^ help: remove these parentheses
   |
note: the lint level is defined here
  --> $DIR/unused_braces.rs:2:24
   |
LL | #![warn(unused_braces, unused_parens)]
   |                        ^^^^^^^^^^^^^

warning: unnecessary braces around assigned value
  --> $DIR/unused_braces.rs:8:13
   |
LL |     let _ = { 7 };
   |             ^^^^^ help: remove these braces
   |
note: the lint level is defined here
  --> $DIR/unused_braces.rs:2:9
   |
LL | #![warn(unused_braces, unused_parens)]
   |         ^^^^^^^^^^^^^

warning: unnecessary braces around `let` scrutinee expression
  --> $DIR/unused_braces.rs:11:16
   |
LL |     if let 7 = { 7 } {
   |                ^^^^^ help: remove these braces

warning: unnecessary braces around const expression
  --> $DIR/unused_braces.rs:15:17
   |
LL |     let _: [u8; { 3 }];
   |                 ^^^^^ help: remove these braces