minor #5560 [2.3] [Contributing] [CS] Added missing docblocks in code snippet (phansys)

This PR was submitted for the 2.7 branch but it was merged into the 2.3 branch instead (closes #5560).

Discussion
----------

[2.3] [Contributing] [CS] Added missing docblocks in code snippet

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | no
| Applies to    |
| Fixed tickets |

Commits
-------

8395e66 [2.3] [Contributing] [CS] Added missing docblocks in code snippet

Author: xabbuh

contributing/code/standards.rst

@@ -37,6 +37,9 @@ example containing most features described below:
     {
         const SOME_CONST = 42;
 
+        /**
+         * @var string
+         */
         private $fooBar;
 
         /**
@@ -48,20 +51,30 @@ example containing most features described below:
         }
 
         /**
-         * @param string $dummy Some argument description
-         * @param array  $options
+         * Transforms the input given as first argument.
+         *
+         * @param bool|string $dummy   Some argument description
+         * @param array       $options An options collection to be used within the transformation
          *
-         * @return string|null Transformed input
+         * @return string|null The transformed input
          *
-         * @throws \RuntimeException
+         * @throws \RuntimeException When an invalid option is provided
          */
         private function transformText($dummy, array $options = array())
         {
+            $defaultOptions = array(
+                'some_default' => 'values',
+                'another_default' => 'more values',
+            );
+
+            foreach ($options as $option) {
+                if (!in_array($option, $defaultOptions)) {
+                    throw new \RuntimeException(sprintf('Unrecognized option "%s"', $option));
+                }
+            }
+
             $mergedOptions = array_merge(
-                array(
-                    'some_default' => 'values',
-                    'another_default' => 'more values',
-                ),
+                $defaultOptions,
                 $options
             );
 
@@ -76,10 +89,16 @@ example containing most features described below:
 
                 return ucwords($dummy);
             }
-
-            throw new \RuntimeException(sprintf('Unrecognized dummy option "%s"', $dummy));
         }
 
+        /**
+         * Performs some basic check for a given value.
+         *
+         * @param mixed $value     Some value to check against
+         * @param bool  $theSwitch Some switch to control the method's flow
+         *
+         * @return bool|null The resultant check if $theSwitch isn't false, null otherwise
+         */
         private function reverseBoolean($value = null, $theSwitch = false)
         {
             if (!$theSwitch) {