Issue #2822296 by shashikant_chauhan, jp.stacey, xjm: Wrong fully qualified...

Issue #2822296 by shashikant_chauhan, jp.stacey, xjm: Wrong fully qualified class name  \Drupal\Core\Routing\LinkGeneratorInterface::generate() in docs of Drupal::l()

(cherry picked from commit 38959d63)