[fix] Correct edge cases of IDF/IDD parsing

[hongyuanjia]

Pull request overview

• Fix IDD parsing when there is no flat or nest attributes

[codecov[bot]]

Codecov Report

Merging #566 (333703b) into master (f784314) will decrease coverage by 0.01%. The diff coverage is 100.00%.

:exclamation: Current head 333703b differs from pull request most recent head 918bc24. Consider uploading reports for the commit 918bc24 to get more accurate results

@@            Coverage Diff             @@
##           master     #566      +/-   ##
==========================================
- Coverage   91.87%   91.87%   -0.01%     
==========================================
  Files          35       35              
  Lines       14296    14296              
==========================================
- Hits        13135    13134       -1     
- Misses       1161     1162       +1     

Impacted Files	Coverage Δ
R/parse.R	98.17% <100.00%> (-0.14%)	:arrow_down:

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more