Pin the suite run, gate the exception list, and trim the corpus README

src/commonmark-spec.test.ts

@@ -56,8 +56,8 @@ const spec = readSpec()
 const exceptions = readExceptions()
 const exceptionIndex = new Map(exceptions.map((entry) => [`${entry.example}:${entry.check}`, entry.reason]))
 
-test('the CommonMark spec suite is the version the parser names', () => {
-  assert.ok(spec.length > 600, `spec.json holds ${spec.length} examples, not a full suite`)
+test('the CommonMark spec suite is the pinned 0.31.2 run', () => {
+  assert.equal(spec.length, 652)
 })
 
 test('the exception list is unique per example and check', () => {

src/corpus.test.ts

@@ -53,7 +53,7 @@ function pairedNames(root: string, first: string, second: string): string[] {
 function corpusJsonPaths(): string[] {
   return readdirSync(corpusRoot, { encoding: 'utf8', recursive: true })
     .filter((name) => name.endsWith('.json'))
-    .filter((name) => !name.startsWith(`commonmark-spec${sep}`))
+    .filter((name) => name !== `commonmark-spec${sep}spec.json`)
     .map((name) => join(corpusRoot, name))
     .sort()
 }