symfony
diff --git a/‎contributing/code/standards.rst
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+9-1Lines changed: 9 additions & 1 deletion b/‎contributing/code/standards.rst
Copy file name to clipboardExpand all lines: contributing/code/standards.rst
+9-1Lines changed: 9 additions & 1 deletion
@@ -79,14 +79,22 @@ example containing most features described below:
 
             throw new \RuntimeException(sprintf('Unrecognized dummy option "%s"', $dummy));
         }
+        
+        private function reverseBoolean($value = null)
+        {
+            if ( ! isset($value)) {
+                return;
+            }
+            return ! $value;
+        }
     }
 
 Structure
 ---------
 
 * Add a single space after each comma delimiter;
 
-* Add a single space around operators (``==``, ``&&``, ...);
+* Add a single space around operators (``==``, ``&&``, ``!``, ...);
 
 * Add a comma after each array item in a multi-line array, even after the
   last one;