diff --git a/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php b/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
index 25eb5b4..2df4311 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/FileCopy.php
@@ -21,10 +21,10 @@
  * if a duplicate exists.
  *
  * The source value is an array of two values:
- * - source: The source path or URI, e.g. /path/to/foo.txt or
- *   public://bar.txt.
- * - destination: The destination path or URI, e.g. /path/to/bar.txt or
- *   public://foo.txt.
+ * - source: The source path or URI, e.g. '/path/to/foo.txt' or
+ *   'public://bar.txt'.
+ * - destination: The destination path or URI, e.g. '/path/to/bar.txt' or
+ *   'public://foo.txt'.
  *
  * Available configuration keys:
  * - move: (optional) Boolean, if TRUE, move the file, otherwise copy the file.
@@ -116,7 +116,7 @@ public static function create(ContainerInterface $container, array $configuratio
   }
 
   /**
-   * Performs the associated process.
+   * Copies a file between the source and destination given by $value.
    *
    * @param string $value
    *   The input string.
@@ -129,7 +129,7 @@ public static function create(ContainerInterface $container, array $configuratio
    *   with the $row above.
    *
    * @return string
-   *   The sub string of $value.
+   *   The final destination of the copied file.
    *
    * @throws \Drupal\migrate\MigrateException
    */