fix: quote embedded paths in status-right widget

tests/90-notifications.bats

@@ -24,11 +24,11 @@ party_rec() { printf '%s/party-%s:%s.d/roster\n' "$PARTY_SOCKET_DIR" "$USER" "$1
   rec=$(party_rec srtest)
   sock=$(awk -F= '$1=="SOCKET"{print $2}' "$rec")
   sr=$(tmux -S "$sock" show-options -gv status-right)
-  [[ "$sr" == *"party who --short"* ]]
+  [[ "$sr" == *"who --short"* ]]
   # The #() body is executed with the tmux server's PATH, which need
   # not contain an installed `party` — the widget must pin the absolute
   # path of the script that hosted the party.
-  [[ "$sr" == "party: #(/"* ]]
+  [[ "$sr" == "party: #('/"* ]]
 }
 
 @test "client-attached hook invokes a notify helper that broadcasts display-message" {