Improve metadata

test/language/expressions/coalesce/tco-cond.js

@@ -1,19 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-/*---
-description: Expression is a candidate for tail-call optimization.
-esid: sec-static-semantics-hascallintailposition
-flags: [onlyStrict]
-features: [tail-call-optimization, coalesce-expression]
-includes: [tcoHelper.js]
----*/
-
-var callCount = 0;
-(function f(n) {
-  if (n === 0) {
-    callCount += 1
-    return;
-  }
-  return f(n - 1) ?? false;
-}($MAX_ITERATIONS));
-assert.sameValue(callCount, 1);

test/language/expressions/coalesce/tco-pos-null.js

@@ -1,8 +1,15 @@
 // Copyright (C) 2019 Leo Balter. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
+
 /*---
 description: Expression is a candidate for tail-call optimization.
 esid: sec-static-semantics-hascallintailposition
+info: |
+  Expression Rules
+
+  CoalesceExpression : CoalesceExpressionHead ?? BitwiseORExpression
+
+  1. Return HasCallInTailPosition of BitwiseORExpression with argument call.
 flags: [onlyStrict]
 features: [tail-call-optimization, coalesce-expression]
 includes: [tcoHelper.js]

test/language/expressions/coalesce/tco-pos-undefined.js

@@ -1,8 +1,15 @@
 // Copyright (C) 2019 Leo Balter. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
+
 /*---
 description: Expression is a candidate for tail-call optimization.
 esid: sec-static-semantics-hascallintailposition
+info: |
+  Expression Rules
+
+  CoalesceExpression : CoalesceExpressionHead ?? BitwiseORExpression
+
+  1. Return HasCallInTailPosition of BitwiseORExpression with argument call.
 flags: [onlyStrict]
 features: [tail-call-optimization, coalesce-expression]
 includes: [tcoHelper.js]