docs: fix typos and copy-paste errors in comments

lib/Drupal/cron/Command/CronCreateCommand.php

@@ -42,7 +42,7 @@ public function execute() {
     $job['name'] = $name;
     drush_log('', 'ok');
 
-    drush_print(dt('The type of the job (can only be set to "shell" at this time.'));
+    drush_print(dt('The type of the job (can only be set to "shell" at this time).'));
     $type = drush_prompt(dt('Type'));
     while (!$this->validateType($type)) {
       drush_print('');

lib/Drupal/cron/Command/CronRunCommand.php

@@ -32,7 +32,7 @@ public function configure(&$items) {
       ),
       'required-arguments' => FALSE,
       'options' => array(
-        'force' => 'Run the specified job, regardless the state of the cron job.',
+        'force' => 'Run the specified job, regardless of the state of the cron job.',
       ),
     );
   }

lib/Drupal/cron/Strategy/ShellStrategy.php

@@ -1,7 +1,7 @@
 <?php
 /**
  * @file
- * Contains Drupal\cron\Resolver\ShellStrategy.
+ * Contains Drupal\cron\Strategy\ShellStrategy.
  */
 
 namespace Drupal\cron\Strategy;

lib/Drupal/cron/Strategy/StrategyInterface.php

@@ -1,7 +1,7 @@
 <?php
 /**
  * @file
- * Contains Drupal\cron\Resolver\StrategyInterface.
+ * Contains Drupal\cron\Strategy\StrategyInterface.
  */
 
 namespace Drupal\cron\Strategy;