CS: Convert double quotes to single quotes

This PR was merged into the 2.3 branch.

Discussion
----------

[Bundle] Fix charset config

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #13715, #7617, #7532
| License       | MIT
| Doc PR        | -

This reverts #13715 and resurrects #7532, which was fine.

Commits
-------

ef41059 [WebProfilerBundle] Set debug+charset on the ExceptionHandler fallback
cbd0525 used HTML5 meta charset tag and removed hardcoded ones
6ca7fc9 Revert "bug #13715 Enforce UTF-8 charset for core controllers (WouterJ)"

ExceptionHandler.php

@@ -92,6 +92,7 @@ class ExceptionHandler
             foreach ($exception->getHeaders() as $name => $value) {
                 header($name.': '.$value, false);
             }
+            header('Content-Type: text/html; charset='.$this->charset);
         }
 
         echo $this->decorate($this->getContent($exception), $this->getStylesheet($exception));
@@ -110,7 +111,7 @@ class ExceptionHandler
             $exception = FlattenException::create($exception);
         }
 
-        return new Response($this->decorate($this->getContent($exception), $this->getStylesheet($exception)), $exception->getStatusCode(), $exception->getHeaders());
+        return Response::create($this->decorate($this->getContent($exception), $this->getStylesheet($exception)), $exception->getStatusCode(), $exception->getHeaders())->setCharset($this->charset);
     }
 
     /**
@@ -297,9 +298,9 @@ EOF;
         $result = array();
         foreach ($args as $key => $item) {
             if ('object' === $item[0]) {
-                $formattedValue = sprintf("<em>object</em>(%s)", $this->abbrClass($item[1]));
+                $formattedValue = sprintf('<em>object</em>(%s)', $this->abbrClass($item[1]));
             } elseif ('array' === $item[0]) {
-                $formattedValue = sprintf("<em>array</em>(%s)", is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
+                $formattedValue = sprintf('<em>array</em>(%s)', is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
             } elseif ('string' === $item[0]) {
                 $formattedValue = sprintf("'%s'", htmlspecialchars($item[1], $flags, $this->charset));
             } elseif ('null' === $item[0]) {