Improve P/R for 4124

Author: jwakely

xml/issue4124.xml

@@ -59,6 +59,8 @@ Let `f` be a <code><i>locale-time-format-t</i>&lt;Duration&gt;</code> object
 passed to `formatter::format`.
 </p>
 <p>-18- <i>Remarks</i>:
+<ins>If the <i>chrono-specs</i> is omitted, the result is equivalent to
+using `%F %T %Z` as the <i>chrono-specs</i>.</ins>
 If `%Z` is used,
 it is replaced with `*f.abbrev` if `f.abbrev` is not a null pointer value.
 If `%Z` is used and `f.abbrev` is a null pointer value,
@@ -68,12 +70,7 @@ it is formatted with the value of `*f.offset_sec` if `f.offset_sec` is
 not a null pointer value.
 If `%z` (or a modified variant of `%z`) is used and `f.offset_sec`
 is a null pointer value, then an exception of type `format_error` is thrown.
-<ins>If the <i>chrono-specs</i> is omitted, `f` is formatted as if by
-`format(loc, "{} {:L%Z}", f.time, f)`, where `loc` is the formatting locale.
-</ins>
 </p>
-<note>Drafting note: The inserted text above is not correct, as it doesn't
-account for padding etc.</note>
 <pre>
   template&lt;class Duration, class TimeZonePtr, class charT&gt;
   struct formatter&lt;chrono::zoned_time&lt;Duration, TimeZonePtr&gt;, charT&gt;