Macro str_assert_ne 

macro_rules! str_assert_ne {
    ($left:expr, $right:expr $(,)?) => { ... };
    ($left:expr, $right:expr, $($arg:tt)+) => { ... };
}

See std::assert_ne for more information. Main differences:

1. Only accepts arguments which impl AsRef<str>
2. Output on assertion failure is printed to stdout as a Vec of Chunks