Upstream brick/date-time state of the touched files before 77aa416937

src/ZonedDateTime.php

@@ -17,10 +17,6 @@ use Stringable;
 
 use function assert;
 use function intdiv;
-use function rtrim;
-use function str_pad;
-
-use const STR_PAD_LEFT;
 
 /**
  * A date-time with a time-zone in the ISO-8601 calendar system.
@@ -739,29 +735,11 @@ final readonly class ZonedDateTime implements JsonSerializable, Stringable
     /**
      * Returns the ISO 8601 representation of this zoned date time.
      *
-     * Unlike {@see LocalTime::toISOString()}, the time part always includes the
-     * seconds, as RFC 3339 section 5.6 requires, even when they are zero.
-     *
      * @return non-empty-string
      */
     public function toISOString(): string
     {
-        $time = $this->localDateTime->getTime();
-
-        $hour = $time->getHour();
-        $minute = $time->getMinute();
-        $second = $time->getSecond();
-        $nano = $time->getNano();
-
-        $string = $this->localDateTime->getDate()
-            . 'T'
-            . ($hour < 10 ? '0' . $hour : $hour)
-            . ':'
-            . ($minute < 10 ? '0' . $minute : $minute)
-            . ':'
-            . ($second < 10 ? '0' . $second : $second)
-            . ($nano !== 0 ? '.' . rtrim(str_pad((string) $nano, 9, '0', STR_PAD_LEFT), '0') : '')
-            . $this->timeZoneOffset;
+        $string = $this->localDateTime . $this->timeZoneOffset;
 
         if ($this->timeZone instanceof TimeZoneRegion) {
             $string .= '[' . $this->timeZone . ']';