Only add the draft header on live preview requests. Closes #1376

Author: jasonvarga

src/Http/Responses/DataResponse.php

@@ -113,7 +113,9 @@ protected function handleDraft()
             throw new NotFoundHttpException;
         }
 
-        $this->headers['X-Statamic-Draft'] = true;
+        if ($this->isLivePreview()) {
+            $this->headers['X-Statamic-Draft'] = true;
+        }
 
         return $this;
     }

tests/FrontendTest.php

@@ -45,7 +45,9 @@ function page_is_displayed()
             ]
         ]);
 
-        $response = $this->get('/about')->assertStatus(200);
+        $response = $this->get('/about')
+            ->assertStatus(200)
+            ->assertHeaderMissing('X-Statamic-Draft');
 
         $this->assertEquals('<h1>The About Page</h1> <p>This is the about page.</p>', trim($response->content()));
     }