fix typos

src/blocks.js

@@ -1877,7 +1877,7 @@ SyntaxElementMorph.prototype.labelPart = function (spec) {
                     case 'read-only':
                         part.isReadOnly = true;
                         if (!MorphicPreferences.isFlat) {
-                            // addjust initial dimensions
+                            // adjust initial dimensions
                             cnts = part.contents();
                             cnts.shadowOffset = new Point(1, 1);
                             cnts.fixLayout();
@@ -3633,7 +3633,7 @@ BlockMorph.prototype.restoreInputs = function (oldInputs, offset = 0) {
 
     // 1.
     // both blocks have exactly one variadic slot, with the same slot spec but
-    // different infixes, and not nessesarily matching numbers of expanded
+    // different infixes, and not necessarily matching numbers of expanded
     // slots.
     if (oldInputs.length === 1 &&
         (inputs.length === 1) &&

src/lists.js

@@ -415,17 +415,17 @@ List.prototype.slice = function (indices) {
     //
     // slicing spec:
     // positive integers represent single indices,
-    // negative integes and zero represent slices starting at the
+    // negative integers and zero represent slices starting at the
     // index following the last specified positive integer up to / down to
     // my length offset by the negative / zero integer
     //
-    // Currently unused and NOT part of the ITEM OF primitivie in
+    // Currently unused and NOT part of the ITEM OF primitive in
     // production Snap, because negative indices are used in exercises and
     // curriculum activities relying on them returning zero / empty values
     // rather than wrapped ones, e.g. when creating a "reverb" or "echo"
     // effect from sound samples.
     //
-    // to be revisited in the future, perhaps as seperate primitive.
+    // to be revisited in the future, perhaps as separate primitive.
     // -Jens
 
     var first, select;