Add documentation on `wrap_err` vs `wrap_err_with` (#93) #312

Job	Run time
Check (stable)	19s
Test Suite (stable)	36s
Rustfmt (stable)	15s
Test Suite (stable, --no-default-features)	37s
Test Suite (ubuntu-latest)	38s
Test Suite (stable, --features track-caller)	37s
Test Suite	4m 18s
Test Suite (windows-latest)	1m 33s
Test Suite (stable, --features pyo3)	36s
Clippy (stable)	27s
Test Suite (--no-default-features)	4m 28s
Test Suite (macOS-latest)	1m 5s
Test Suite (stable, --features auto-install)	35s
Test Suite (--features track-caller)	4m 16s
Test Suite (stable, --all-features)	39s
Test Suite (--features auto-install)	4m 15s
Miri	1m 6s
Test Suite (beta)	35s
Test Suite (beta, --no-default-features)	36s
Test Suite (beta, --features track-caller)	36s
Test Suite (beta, --features pyo3)	34s
Test Suite (beta, --features auto-install)	33s
Test Suite (beta, --all-features)	40s
Test Suite (nightly)	45s
Test Suite (nightly, --no-default-features)	42s
Test Suite (nightly, --features track-caller)	43s
Test Suite (nightly, --features pyo3)	48s
Test Suite (nightly, --features auto-install)	44s
Test Suite (nightly, --all-features)	48s
	34m 24s

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