compare strings with SameValue

spec.html

@@ -36286,7 +36286,7 @@ <h1>
                 1. For each integer _j_ such that _j_ &ge; 1 and _j_ &lt; _i_, do
                   1. If the _j_<sup>th</sup> capture of _R_ was defined with a |GroupName|, then
                     1. Let _sj_ be the CapturingGroupName of that |GroupName|.
-                    1. If _sj_ equals _s_ and the _j_<sup>th</sup> element of _r_'s _captures_ List is not *undefined*, set _isMatchedEarlier_ to *true*.
+                    1. If SameValue(_sj_, _s_) is *true* and the _j_<sup>th</sup> element of _r_'s _captures_ List is not *undefined*, set _isMatchedEarlier_ to *true*.
                 1. If _isMatchedEarlier_ is *false*, then
                   1. NOTE: If there are multiple groups named _s_, _groups_ may already have an _s_ property at this point. However, because _groups_ is an ordinary object whose properties are all writable data properties, the call to CreateDataPropertyOrThrow is nevertheless guaranteed to succeed.
                   1. Perform ! CreateDataPropertyOrThrow(_groups_, _s_, _capturedValue_).