fix a couple typos in comments

Author: etpinard

src/plots/plots.js

@@ -2202,7 +2202,7 @@ plots.transition = function(gd, data, layout, traces, frameOpts, transitionOpts)
             // There's nothing to do if this module is not defined:
             if(!module) continue;
 
-            // Don't register the trace as transitioned if it doens't know what to do.
+            // Don't register the trace as transitioned if it doesn't know what to do.
             // If it *is* registered, it will receive a callback that it's responsible
             // for calling in order to register the transition as having completed.
             if(module.animatable) {

test/jasmine/tests/animate_test.js

@@ -93,7 +93,7 @@ describe('Test animate API', function() {
         //
         // This means that you should not expect `.animate` to actually
         // modify the plot in any way in the tests below. For tests
-        // involvingnon-faked transitions, see the bottom of this file.
+        // involving non-faked transitions, see the bottom of this file.
         // ------------------------------------------------------------
 
         spyOn(Plots, 'transition').and.callFake(function() {