wording - fixes #399

@@ -59,10 +59,10 @@ casper.test.begin('fill() tests', 15, function(test) {
     });
 });
 
-casper.test.begin('unexistent fields', 1, function(test) {
+casper.test.begin('nonexistent fields', 1, function(test) {
     casper.start('tests/site/form.html', function() {
         test.assertRaises(this.fill, ['form[action="result.html"]', {
-            unexistent: 42
+            nonexistent: 42
         }, true], 'Casper.fill() raises an exception when unable to fill a form');
     }).run(function() {
         test.done();

@@ -11,7 +11,7 @@ casper.test.begin('XPath tests', 6, function(test) {
         test.assertDoesntExist({
             type: 'xpath',
             path: '/html/body/ol/li[2]'
-        }, 'XPath selector does not retrieve an unexistent element');
+        }, 'XPath selector does not retrieve a nonexistent element');
         test.assertExists(x('/html/body/ul/li[2]'), 'selectXPath() shortcut can find an element as well');
         test.assertEvalEquals(function() {
             return __utils__.findAll({type: 'xpath', path: '/html/body/ul/li'}).length;