- Prefix file names to explicitly describe the "head" position
- Remove statement name suffix as this information is reflected by each
  file's location within the file hierarchy

These tests are derived from the following files within the Google V8 project:

    test/mjsunit/es6/regress/regress-2506.js
    test/mjsunit/es6/regress/regress-3426.js
    test/mjsunit/es6/regress/regress-3683.js