Update documentation for shutil.move (#12043) and fix a few typos.

Adding Sandro Tosi to Doc/ACKS for this patch and all his work on the
docs mailing list and on the bug tracker.
diff --git a/Doc/ACKS.txt b/Doc/ACKS.txt
index c528247..271ece9 100644
--- a/Doc/ACKS.txt
+++ b/Doc/ACKS.txt
@@ -203,6 +203,7 @@
    * Kalle Svensson
    * Jim Tittsler
    * David Turner
+   * Sandro Tosi
    * Ville Vainio
    * Martijn Vries
    * Charles G. Waldman