Fix era canonicalization

Pretty sure this was supposed to return the Era value from the table,
not the alias.

Author: ptomato

index.html

@@ -4335,7 +4335,7 @@ <h1><span class="secnum">4.1.2</span> CanonicalizeEraInCalendar ( <var>calendar<
       <p>The abstract operation CanonicalizeEraInCalendar takes arguments <var>calendar</var> (a String) and <var>era</var> (a String) and returns a String or <emu-val>undefined</emu-val>. 
           The following algorithm refers to the era data from <a href="https://unicode.org/reports/tr35/tr35-dates.html#Calendar_Data">UTS 35's Supplemental Calendar Data</a>.
          It performs the following steps when called:</p>
-      <emu-alg><ol><li>For each row of <emu-xref href="#table-eras" id="_ref_4"><a href="#table-eras">Table 2</a></emu-xref>, do<ol><li>Let <var>cal</var> be the Calendar value of the current row.</li><li>If <var>cal</var> is equal to <var>calendar</var>, then<ol><li>Let <var>e</var> be the Era value of the current row.</li><li>If <var>e</var> is equal to <var>era</var>, return <var>era</var>.</li><li>Let <var>aliases</var> be a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> whose elements are the strings given in the Aliases column of the row.</li><li>If <var>aliases</var> contains <var>era</var>, return <var>era</var>.</li></ol></li></ol></li><li>Return <emu-val>undefined</emu-val>.</li></ol></emu-alg>
+      <emu-alg><ol><li>For each row of <emu-xref href="#table-eras" id="_ref_4"><a href="#table-eras">Table 2</a></emu-xref>, do<ol><li>Let <var>cal</var> be the Calendar value of the current row.</li><li>If <var>cal</var> is equal to <var>calendar</var>, then<ol><li>Let <var>e</var> be the Era value of the current row.</li><li>If <var>e</var> is equal to <var>era</var>, return <var>era</var>.</li><li>Let <var>aliases</var> be a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> whose elements are the strings given in the Aliases column of the row.</li><li>If <var>aliases</var> contains <var>era</var>, return <var>e</var>.</li></ol></li></ol></li><li>Return <emu-val>undefined</emu-val>.</li></ol></emu-alg>
     </emu-clause>
 
     <emu-clause id="sec-temporal-isvalidmonthecodeforcalendar" type="abstract operation" aoid="IsValidMonthCodeForCalendar">

spec.emu

@@ -445,7 +445,7 @@ contributors: Google, Ecma International
             1. Let _e_ be the Era value of the current row.
             1. If _e_ is equal to _era_, return _era_.
             1. Let _aliases_ be a List whose elements are the strings given in the Aliases column of the row.
-            1. If _aliases_ contains _era_, return _era_.
+            1. If _aliases_ contains _era_, return _e_.
         1. Return *undefined*.
       </emu-alg>
     </emu-clause>