More updates

Author: sffc

common/supplemental/supplementalData.xml

@@ -4835,7 +4835,7 @@ XXX Code for transations where no currency is involved
         <calendar type="coptic">
           <calendarSystem type="other"/>
           <eras>
-              <era type="0" end="284-08-28" code="??? TODO ???"/>
+              <era type="0" end="284-08-28" code="bd"/> <!-- NOTE: No evidence this era is used -->
               <era type="1" start="284-08-29" code="am" primary="true"/> <!-- Anno Martyrum -->
           </eras>
         </calendar>
@@ -4870,8 +4870,8 @@ XXX Code for transations where no currency is involved
         </calendar>
         <calendar type="roc">
           <eras>
-              <era type="0" end="1911-12-31" code="roc-inverse" aliases="before-roc"/>
-              <era type="1" start="1912-01-01" code="roc" aliases="minguo" primary="true"/>
+              <era type="0" end="1911-12-31" code="minguo-qian" aliases="broc before-roc"/>
+              <era type="1" start="1912-01-01" code="minguo" primary="true"/>
           </eras>
         </calendar>