The document fragments used by the ECMAScript specification do not
conform to any particular pattern beyond the grammar defined by the URL
standard [1]. Relax the linting rule to enforce a simplified version of
that grammar.

[1] https://url.spec.whatwg.org/#fragment-state

This script is intended to identify common test file formatting errors
prior to their acceptance into the project. It is designed to support
future extensions for additional validation rules.