Better management of errors

app/Main.php

@@ -96,9 +96,9 @@ class Main extends Controller {
                 $f3->set('VERB', 'GET');
                 $this->feedbackform($f3, $args);
             } catch (RequestException $e) {
-                $block_content = print_r(Psr7\str($e->getRequest()));
+                $block_content = Psr7\str($e->getRequest());
                 if ($e->hasResponse()) {
-                    $block_content .= print_r(Psr7\str($e->getResponse()));
+                    $block_content .= Psr7\str($e->getResponse());
                 }
                 $f3->set('block_content', $block_content);
             }