Standards: introduce prepareInstalledStandardsForDisplay() method

src/Config.php

@@ -685,10 +685,7 @@ public function processShortArgument($arg, $pos)
             ob_end_clean();
             throw new DeepExitException($output, 0);
         case 'i' :
-            ob_start();
-            Standards::printInstalledStandards();
-            $output = ob_get_contents();
-            ob_end_clean();
+            $output = Standards::prepareInstalledStandardsForDisplay().PHP_EOL;
             throw new DeepExitException($output, 0);
         case 'v' :
             if ($this->quiet === true) {

src/Runner.php

@@ -258,11 +258,8 @@ public function init()
             if (Standards::isInstalledStandard($standard) === false) {
                 // They didn't select a valid coding standard, so help them
                 // out by letting them know which standards are installed.
-                $error = 'ERROR: the "'.$standard.'" coding standard is not installed. ';
-                ob_start();
-                Standards::printInstalledStandards();
-                $error .= ob_get_contents();
-                ob_end_clean();
+                $error  = 'ERROR: the "'.$standard.'" coding standard is not installed.'.PHP_EOL.PHP_EOL;
+                $error .= Standards::prepareInstalledStandardsForDisplay().PHP_EOL;
                 throw new DeepExitException($error, 3);
             }
         }

src/Util/Standards.php

@@ -312,28 +312,45 @@ public static function getInstalledStandardPath($standard)
 
 
     /**
-     * Prints out a list of installed coding standards.
+     * Prepares a list of installed coding standards for display.
      *
-     * @return void
+     * @return string
      */
-    public static function printInstalledStandards()
+    public static function prepareInstalledStandardsForDisplay()
     {
         $installedStandards = self::getInstalledStandards();
         $numStandards       = count($installedStandards);
 
+        $output = '';
         if ($numStandards === 0) {
-            echo 'No coding standards are installed.'.PHP_EOL;
+            $output .= 'No coding standards are installed.';
         } else {
             $lastStandard = array_pop($installedStandards);
             if ($numStandards === 1) {
-                echo "The only coding standard installed is $lastStandard".PHP_EOL;
+                $output .= "The only coding standard installed is $lastStandard";
             } else {
                 $standardList  = implode(', ', $installedStandards);
                 $standardList .= ' and '.$lastStandard;
-                echo 'The installed coding standards are '.$standardList.PHP_EOL;
+                $output       .= 'The installed coding standards are '.$standardList;
             }
         }
 
+        return $output;
+
+    }//end prepareInstalledStandardsForDisplay()
+
+
+    /**
+     * Prints out a list of installed coding standards.
+     *
+     * @deprecated 4.0.0 Use `echo Standards::prepareInstalledStandardsForDisplay()` instead.
+     *
+     * @return void
+     */
+    public static function printInstalledStandards()
+    {
+        echo self::prepareInstalledStandardsForDisplay(), PHP_EOL;
+
     }//end printInstalledStandards()