Issue #3511456 by arunsahijpal, godotislate: Documentation for...

Issue #3511456 by arunsahijpal, godotislate: Documentation for FileRepositoryInterface::writeData() says it creates a file entity, but it can update existing

(cherry picked from commit 67e7a25f)

core/modules/file/src/FileRepositoryInterface.php

@@ -10,7 +10,10 @@
 interface FileRepositoryInterface {
 
   /**
-   * Writes a file to the specified destination and creates a file entity.
+   * Writes a file to the specified destination.
+   *
+   * If a file entity already exists for the URI, it is updated; otherwise,
+   * a new file entity is created.
    *
    * @param string $data
    *   A string containing the contents of the file.