## Debugging
Some `rewrite_*` methods use the `debug!` macro for printing useful information.
-These messages can be printed by using the environment variable `RUST_LOG=rustfmt=DEBUG`.
+These messages can be printed by using the environment variable `RUSTFMT_LOG=rustfmt=DEBUG`.
These traces can be helpful in understanding which part of the code was used
and get a better grasp on the execution flow.