added clarifying commends on hourCycle-dateStyle.js

test/intl402/DateTimeFormat/prototype/resolvedOptions/hourCycle-dateStyle.js

@@ -6,9 +6,38 @@ esid: sec-Intl.DateTimeFormat.prototype.resolvedOptions
 description: >
   Intl.DateTimeFormat.prototype.resolvedOptions properly
   reflect hourCycle settings when using dateStyle.
+  Note: "properly reflect hourCycle settings when using dateStyle", in this context, means "if dateStyle but not timeStyle is set, both hourCycle and hour12 will be *undefined*". This is because the CreateDateTimeFormat AO resets [[HourCycle]] to *undefined* if [[Hour]] is *undefined*, and if dateStyle but not timeStyle is set, [[HourCycle]] is set to *undefined*. 
+info: |
+  11.3.7 Intl.DateTimeFormat.prototype.resolvedOptions()
+  ...
+  5. For each row of Table 6, except the header row, in table order, do
+    a. Let p be the Property value of the current row.
+    b. If p is "hour12", then
+        i. Let hc be dtf.[[HourCycle]].
+        ii. If hc is "h11" or "h12", let v be true.
+        iii. Else if, hc is "h23" or "h24", let v be false.
+        iv. Else, let v be undefined.
+    c. Else,
+        i. Let v be the value of dtf's internal slot whose name is the Internal Slot value of the current row.
+    d. If the Internal Slot value of the current row is an Internal Slot value in Table 7, then
+        i. If dtf.[[DateStyle]] is not undefined or dtf.[[TimeStyle]] is not undefined, then
+            1. Let v be undefined.
+    e. If v is not undefined, then
+        i. Perform ! CreateDataPropertyOrThrow(options, p, v).
+
+  11.1.2 CreateDateTimeFormat( newTarget, locales, options, required, defaults)
+  ...
+  45. If dateTimeFormat.[[Hour]] is undefined, then
+
+    a. Set dateTimeFormat.[[HourCycle]] to undefined.
+
+
+
+
+
 features: [Intl.DateTimeFormat-datetimestyle]
 ---*/
-
+  
 const hcValues = ["h11", "h12", "h23", "h24"];
 const hour12Values = ["h11", "h12"];
 
@@ -17,7 +46,7 @@ for (const dateStyle of ["full", "long", "medium", "short"]) {
                    dateStyle,
                    `Should support dateStyle=${dateStyle}`);
 
-  /* Values passed via unicode extension key work */
+  /* Values passed via unicode extension key set to *undefined* */
 
   for (const hcValue of hcValues) {
     const resolvedOptions = new Intl.DateTimeFormat(`de-u-hc-${hcValue}`, {
@@ -28,7 +57,7 @@ for (const dateStyle of ["full", "long", "medium", "short"]) {
     assert.sameValue(resolvedOptions.hour12, undefined);
   }
 
-  /* Values passed via options work */
+  /* Values passed via options set to *undefined**/
 
   for (const hcValue of hcValues) {
     const resolvedOptions = new Intl.DateTimeFormat("en-US", {