cleaned up cast-enum-const.rs
cleaned up ufcs-trait-object-format.rs
add comment to cast-to-box-arr.rs
add comment to shadow-primitives.rs
add comment to associated-type-const-nomalization.rs
add comment to fn-trait-explicit-call.rs
add comment to call-unit-struct-impl-fn-once.rs
add comment to cast-to-char-compare.rs
add comment to self-in-method-body-resolves.rs
add comment to derive-debug-newtype-unsized-slice.rs
add comment to tuple-ref-order-distinct-impls.rs
add comment to derive-debug-generic-with-lifetime.rs
add comment to recursive-trait-bound-on-type-param.rs
cleaned up const-static-ref-to-closure.rs
add comment to const-iter-no-conflict-for-loop.rs
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