`format argument must be a string literal` could suggest inline args

[matthiaskrgr]

Code

let stderr = 3;
eprintln!({stderr})

Current output

|
4 | eprintln!({stderr})
  |           ^^^^^^^^
  |
help: you might be missing a string literal to format with
  |
4 | eprintln!("{}", {stderr})
  |           +++++

Desired output

|
4 | eprintln!({stderr})
  |           ^^^^^^^^
  |
help: quote your inlined format argument to use at as string literal
  |
4 | eprintln!("{stderr}")
  |           +        + 

Rationale and extra context

No response

Other cases

No response

Anything else?

No response