Account for `let foo = expr`; to suggest `const foo: Ty = expr;`

Account for `let foo = expr`; to suggest `const foo: Ty = expr;` · rust-lang/rust@cbe7548

@@ -376,8 +376,8 @@ LL | asm!("{}", options(), const foo);

376376 |377377help: consider using `const` instead of `let`378378 |379-LL | const foo = 0;380- | ~~~~~379+LL | const foo: /* Type */ = 0;380+ | ~~~~~ ++++++++++++381381382382error[E0435]: attempt to use a non-constant value in a constant383383 --> $DIR/parse-error.rs:71:44

@@ -387,8 +387,8 @@ LL | asm!("{}", clobber_abi("C"), const foo);

387387 |388388help: consider using `const` instead of `let`389389 |390-LL | const foo = 0;391- | ~~~~~390+LL | const foo: /* Type */ = 0;391+ | ~~~~~ ++++++++++++392392393393error[E0435]: attempt to use a non-constant value in a constant394394 --> $DIR/parse-error.rs:74:55

@@ -398,8 +398,8 @@ LL | asm!("{}", options(), clobber_abi("C"), const foo);

398398 |399399help: consider using `const` instead of `let`400400 |401-LL | const foo = 0;402- | ~~~~~401+LL | const foo: /* Type */ = 0;402+ | ~~~~~ ++++++++++++403403404404error[E0435]: attempt to use a non-constant value in a constant405405 --> $DIR/parse-error.rs:76:31

@@ -409,8 +409,8 @@ LL | asm!("{a}", a = const foo, a = const bar);

409409 |410410help: consider using `const` instead of `let`411411 |412-LL | const foo = 0;413- | ~~~~~412+LL | const foo: /* Type */ = 0;413+ | ~~~~~ ++++++++++++414414415415error[E0435]: attempt to use a non-constant value in a constant416416 --> $DIR/parse-error.rs:76:46

@@ -420,8 +420,8 @@ LL | asm!("{a}", a = const foo, a = const bar);

420420 |421421help: consider using `const` instead of `let`422422 |423-LL | const bar = 0;424- | ~~~~~423+LL | const bar: /* Type */ = 0;424+ | ~~~~~ ++++++++++++425425426426error: aborting due to 64 previous errors427427