clippy 0.0.208

A bunch of helpful lints to avoid common pitfalls in Rust
error: The use of negated comparision operators on partially orded types produces code that is hard to read and refactor. Please consider to use the `partial_cmp` instead, to make it clear that the two values could be incomparable.
  --> $DIR/neg_cmp_op_on_partial_ord.rs:17:21
   |
17 |     let _not_less = !(a_value < another_value);
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D neg-cmp-op-on-partial-ord` implied by `-D warnings`

error: The use of negated comparision operators on partially orded types produces code that is hard to read and refactor. Please consider to use the `partial_cmp` instead, to make it clear that the two values could be incomparable.
  --> $DIR/neg_cmp_op_on_partial_ord.rs:20:30
   |
20 |     let _not_less_or_equal = !(a_value <= another_value);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: The use of negated comparision operators on partially orded types produces code that is hard to read and refactor. Please consider to use the `partial_cmp` instead, to make it clear that the two values could be incomparable.
  --> $DIR/neg_cmp_op_on_partial_ord.rs:23:24
   |
23 |     let _not_greater = !(a_value > another_value);
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: The use of negated comparision operators on partially orded types produces code that is hard to read and refactor. Please consider to use the `partial_cmp` instead, to make it clear that the two values could be incomparable.
  --> $DIR/neg_cmp_op_on_partial_ord.rs:26:33
   |
26 |     let _not_greater_or_equal = !(a_value >= another_value);
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors