Ancestor issue: #511

Commit: fdf2a03

Report 1: quality_report_20190125_fdf2a03.zip
Report 2: quality_report_2_fdf2a03.zip

Main differences appeared for several random repositories and affect precision as well as full_support which supposed to be constant anyway.

Main suspects:

1. bblfsh. Something can break randomly during style-analyzer work. That's why we have different full_support number.