apps/files_trashbin: Fix typos in comments (found and fixed by codespell)

Fix also a wrong word.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

apps/files_trashbin/lib/trashbin.php

@@ -56,7 +56,7 @@ class Trashbin {
 	private static $scannedVersions = false;
 
 	/**
-	 * Ensure we dont need to scan the file during the move to trash
+	 * Ensure we don't need to scan the file during the move to trash
 	 * by triggering the scan in the pre-hook
 	 *
 	 * @param array $params

apps/files_trashbin/tests/storage.php

@@ -435,7 +435,7 @@ class Storage extends \Test\TestCase {
 	}
 
 	/**
-	 * Delete should fail is the source file cant be deleted
+	 * Delete should fail if the source file can't be deleted.
 	 */
 	public function testSingleStorageDeleteFileFail() {
 		/**
@@ -472,7 +472,7 @@ class Storage extends \Test\TestCase {
 	}
 
 	/**
-	 * Delete should fail is the source folder cant be deleted
+	 * Delete should fail if the source folder can't be deleted.
 	 */
 	public function testSingleStorageDeleteFolderFail() {
 		/**