doc: stash: document more options

Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-stash.txt b/Documentation/git-stash.txt
index 69281fc..4303b5a 100644
--- a/Documentation/git-stash.txt
+++ b/Documentation/git-stash.txt
@@ -194,6 +194,18 @@
 The `--patch` option implies `--keep-index`.  You can use
 `--no-keep-index` to override this.
 
+-q::
+--quiet::
+	This option is only valid for `apply`, `drop`, `pop`, `push`,
+	`save`, `store` commands.
++
+Quiet, suppress feedback messages.
+
+\--::
+	This option is only valid for `push` command.
++
+Separates pathspec from options for disambiguation purposes.
+
 <pathspec>...::
 	This option is only valid for `push` command.
 +