[FIX] document_page_approval: ruff format

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: gregory-rutecki

document_page_approval/models/document_page_history.py

@@ -44,9 +44,7 @@ def action_draft(self):
         """Set a change request as draft"""
         for rec in self:
             if not rec.state == "cancelled":
-                raise UserError(
-                    self.env._("You need to cancel it before reopening.")
-                )
+                raise UserError(self.env._("You need to cancel it before reopening."))
             if not (rec.am_i_owner or rec.am_i_approver):
                 raise UserError(
                     self.env._(