made identity comparison of texts case-sensitive

HISTORY.md

@@ -3,6 +3,7 @@
 ## in development:
 
 * **Notable Changes:**
+    * identity comparison of texts is now case-sensitive
     * hyperized image attribute reporter primitive (monadic)
     * when constructing a costume from a pixel list handle single values as greyscale
     * experimental "transpose (list)" primitive relabelling option for "all but first"
@@ -19,6 +20,7 @@
 
 ### 2021-01-02
 * lists: refactored some matrix operations
+* threads: made identity comparison of texts case-sensitive
 
 ### 2021-01-30
 * threads, objects, lists: renamed experimental "rotate" primitive into "transpose"

snap.html

@@ -9,7 +9,7 @@
         <script src="src/symbols.js?version=2020-10-07"></script>
         <script src="src/widgets.js?version=2021-01-05"></script>
         <script src="src/blocks.js?version=2020-12-22"></script>
-        <script src="src/threads.js?version=2021-01-30"></script>
+        <script src="src/threads.js?version=2021-02-01"></script>
         <script src="src/objects.js?version=2021-01-30"></script>
         <script src="src/gui.js?version=2021-01-21"></script>
         <script src="src/paint.js?version=2020-05-17"></script>

src/threads.js

@@ -61,7 +61,7 @@ StageMorph, SpriteMorph, StagePrompterMorph, Note, modules, isString, copy, Map,
 isNil, WatcherMorph, List, ListWatcherMorph, alert, console, TableMorph, BLACK,
 TableFrameMorph, ColorSlotMorph, isSnapObject, newCanvas, Symbol, SVG_Costume*/
 
-modules.threads = '2021-January-30';
+modules.threads = '2021-February-01';
 
 var ThreadManager;
 var Process;
@@ -3904,6 +3904,10 @@ Process.prototype.reportNot = function (bool) {
 
 Process.prototype.reportIsIdentical = function (a, b) {
     var tag = 'idTag';
+    if (isString(a) && isString(b)) {
+        // compare texts case-sentitive
+        return a === b;
+    }
     if (this.isImmutable(a) || this.isImmutable(b)) {
         return snapEquals(a, b);
     }