An extension trait for ControlFlow which provides inspection methods

The naming conventions are derived from Result::inspect_err. Since ControlFlow is more symmetrical than Result, the methods are called inspect_break and inspect_continue.

controlflow_inspect

inspect_break and inspect_continue for ControlFlow.

Overview

Analogically to inspect and inspect_err for inspecting values inside Result, this crate introduces inspect_break and inspect_continue for ControlFlow. Neither the break nor the continue variant of ControlFlow is more important than the other, so the methods are named symmetrically.