assert2 0.4.0

assert!(...) and check!(...) macros inspired by Catch2, now with diffs!
Documentation 
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Assertion failed at main.rs:5:2
  assert!( false )
with expansion:
  false


thread 'main' panicked at main.rs:5:5
assertion failed
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace