Rewrite doc example of ListArray and LargeListArray

[HaoYang670]

Signed-off-by: remzi 13716567376yh@gmail.com

Which issue does this PR close?

Closes #1433.

Rationale for this change

Make the example more readable.

[codecov-commenter]

Codecov Report

Merging #1447 (5d2563f) into master (729934c) will decrease coverage by 0.00%.
The diff coverage is 75.00%.

❗ Current head 5d2563f differs from pull request most recent head ed98642. Consider uploading reports for the commit ed98642 to get more accurate results

@@            Coverage Diff             @@
##           master    #1447      +/-   ##
==========================================
- Coverage   82.67%   82.67%   -0.01%     
==========================================
  Files         185      185              
  Lines       53822    53866      +44     
==========================================
+ Hits        44500    44535      +35     
- Misses       9322     9331       +9     

Impacted Files	Coverage Δ
arrow/src/array/array_list.rs	95.52% <ø> (ø)
integration-testing/src/lib.rs	0.00% <0.00%> (ø)
parquet/src/encodings/encoding.rs	93.56% <83.33%> (-0.16%)	⬇️
parquet/src/encodings/decoding.rs	89.54% <91.17%> (+0.07%)	⬆️
parquet_derive/src/parquet_field.rs	65.98% <0.00%> (ø)
arrow/src/array/transform/mod.rs	86.43% <0.00%> (+0.11%)	⬆️
parquet/src/util/bit_util.rs	93.19% <0.00%> (+0.18%)	⬆️
arrow/src/datatypes/field.rs	54.10% <0.00%> (+0.30%)	⬆️

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[HaoYang670]

@sunchao @jackwener Could you please help to review? Thank you!

[jackwener]

Thanks @HaoYang670
It improves readability

[sunchao]

LGTM too

[sunchao]

Merged, thanks!