Attempt to refactor load and short_range_check functions #245

Job	Run time
Book tests	1m 23s
Intra-doc links	1m 19s
Bitrot check	1m 41s
Build target wasm32-unknown-unknown	1m 42s
Rustfmt	17s
Build target wasm32-wasi	1m 29s
Test on ubuntu-latest	7m 13s
Test on i686-unknown-linux-gnu	13m 29s
Test on windows-latest	10m 39s
Test on i686-unknown-linux-gnu with beta features	12m 51s
Test on macOS-latest	7m 41s
Test on i686-unknown-linux-gnu with nightly features	15m 46s
Test on ubuntu-latest with beta features	7m 7s
Test on windows-latest with beta features	9m 51s
Test on macOS-latest with beta features	6m 58s
Test on ubuntu-latest with nightly features	8m 20s
Test on windows-latest with nightly features	10m 54s
Test on macOS-latest with nightly features	7m 36s
	2h 6m 16s

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