Fix the doc about exception handling in the HttpClient component

Author: stof

Diff for: components/http_client.rst

@@ -304,7 +304,7 @@ When the HTTP status code of the response is not in the 200-299 range (i.e. 3xx,
     $content = $response->getContent();
 
     // pass FALSE as the optional argument to not throw an exception and
-    // return instead an empty string
+    // return instead the response content even for errors
     $content = $response->getContent(false);
 
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