added more relabelling options for "rotate"

HISTORY.md

@@ -21,6 +21,7 @@
 * threads, objects: removed previous experimental "column" and "width" primitives again
 * lists, threads, objects refactored experimental "rotate" primitive
 * updated German translation
+* added more relabelling options for "rotate"
 
 ### 2021-01-27
 * threads: hyperized new experimental "column" primitive

src/objects.js

@@ -1716,8 +1716,9 @@ SpriteMorph.prototype.blockAlternatives = {
     doHideVar: ['doShowVar'],
 
     // lists
-    reportCDR: ['reportTableRotated'],
-    reportTableRotated: ['reportCDR'],
+    reportCDR: ['reportTableRotated', 'reportListLength'],
+    reportTableRotated: ['reportCDR', 'reportListLength'],
+    reportListLength: ['reportTableRotated', 'reportCDR'],
 
     // HOFs
     reportMap: ['reportKeep', 'reportFindFirst'],