Assert a ::std::fs::read_to_string(path) is not equal to another.
Pseudocode:
std::fs::read_to_string(a_path) ≠ std::fs::read_to_string(b_path)
§Example
use assertables::*;
let a ="alfa.txt";
let b ="bravo.txt";
assert_fs_read_to_string_ne!(&a, &b);
§Module macros