Improve simple_write example (#747) #540

Job	Run time
build (ubuntu-latest, stable)	47s
build (ubuntu-latest, beta)	43s
build (ubuntu-latest, nightly)	44s
bench	1m 15s
build (stable, macOS-latest)	50s
Build fuzz targets	1m 8s
features	2m 56s
msrv	3m 0s
msrv-read	2m 55s
coverage	1m 9s
cross (i686-unknown-linux-gnu)	49s
rustfmt	9s
cross (powerpc64-unknown-linux-gnu)	58s
doc	30s
Run `debug_abbrev` fuzz target	5m 6s
Run `debug_aranges` fuzz target	5m 5s
Run `debug_info` fuzz target	5m 6s
Run `debug_line` fuzz target	5m 12s
Run `eh_frame` fuzz target	5m 10s
Run `eh_frame_hdr` fuzz target	5m 6s
	48m 38s

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