Fix teh misspellings

modules/core/locations.js

@@ -153,7 +153,7 @@ export function coreLocations() {
   //   …
   //  ]
   //
-  //  Returns a Promise fullfilled when the resolving/indexing has been completed
+  //  Returns a Promise fulfilled when the resolving/indexing has been completed
   //  This will take some seconds but happen in the background during browser idle time.
   //
   _this.mergeLocationSets = (objects) => {

modules/validations/outdated_tags.js

@@ -33,7 +33,7 @@ export function validationOutdatedTags() {
     });
   }
 
-  // This Promise will fullfill after NSI presets are loaded and locations merged into the locationManager.
+  // This Promise will fulfill after NSI presets are loaded and locations merged into the locationManager.
   function waitForNSIPresets() {
     return Promise.all([
       fileFetcher.get('nsi_presets'),

test/spec/core/locations.js

@@ -24,7 +24,7 @@ describe('iD.coreLocations', function() {
 
 
     beforeEach(function() {
-        // make a new one each time, so we aren't accidently testing the "global" locationManager
+        // make a new one each time, so we aren't accidentally testing the "global" locationManager
         locationManager = iD.coreLocations();
         loco = locationManager.loco();
     });