Using println breaks when cargo-expand uses rustfmt

[JelteF]

For finding out where I was generating wrongly formatted quotes I used println('{:?}', tokens) to find out what tokens were being generated. Leaving those prints in causes cargo expand to hiccup when rustfmt is in the path, because they are seen as the first part of the code and it's not valid Rust.

error: expected item, found `Tokens`
 --> stdin:1:1
  |
1 | Tokens("MyInt ( self . 0 . add ( rhs . 0 ) )")
  | ^^^^^^

This can be worked around by using RUSTFMT= cargo expand, to disable rustfmt.

[dtolnay]

Thanks for reporting this! I fixed this in cargo-expand 0.3.6.

[JelteF]

Great!