Move output buffer clearing to individual handlers

examples/example-ajax-only.php

@@ -43,4 +43,4 @@ $run->pushHandler($jsonHandler);
 
 // That's it! Register Whoops and throw a dummy exception:
 $run->register();
-throw new RuntimeException("Oh fudge napkins!");
+throw new RuntimeException("Oh fudge napkins!");

src/Whoops/Handler/JsonResponseHandler.php

@@ -71,6 +71,9 @@ class JsonResponseHandler extends Handler
             return Handler::DONE;
         }
 
+        // Remove any previous output
+        ob_get_level() and ob_end_clean();
+
         $exception = $this->getException();
 
         $response = array(
@@ -103,4 +106,4 @@ class JsonResponseHandler extends Handler
         echo json_encode($response);
         return Handler::QUIT;
     }
-}
+}

src/Whoops/Handler/PrettyPageHandler.php

@@ -58,6 +58,9 @@ class PrettyPageHandler extends Handler
         if(php_sapi_name() === 'cli' && !isset($_ENV['whoops-test'])) {
             return Handler::DONE;
         }
+        
+        // Remove any previous output
+        ob_get_level() and ob_end_clean();
 
         // Get the 'pretty-template.php' template file
         // @todo: this can be made more dynamic &&|| cleaned-up

src/Whoops/Run.php

@@ -144,9 +144,6 @@ class Run
      */
     public function handleException(Exception $exception)
     {
-        // Remove any previous output
-        ob_get_level() and ob_end_clean();
-
         // Walk the registered handlers in the reverse order
         // they were registered, and pass off the exception
         $inspector = $this->getInspector($exception);