Function compare_tokenstreams 

pub fn compare_tokenstreams(
    first_tokenstream: &impl Display,
    second_tokenstream: &impl Display,
)

Panics

This function will panic if:

• The token streams are not equal.
• Either token stream is not valid Rust code.
• rustfmt is not installed or is configured incorrectly.
• It was not possible to create a child process to run rustfmt.
• The output of rustfmt could not be converted to UTF-8.