Function clearDebugEnv

__tests__/explore-diagnostics.test.ts:24–26

Restore the env var to "unset" — `delete` matters; '' is a distinct case.

()

/** Restore the env var to "unset" — `delete` matters; '' is a distinct case. */
function clearDebugEnv(): void {
  delete process.env[DEBUG_ENV];
}

describe('attributeSourceBytes', () => {
  it('attributes a fenced block to the file section header above it', () => {