Clean up comments, standardize whitespace.

src/Mustache/Cache/AbstractCache.php

@@ -20,11 +20,21 @@ abstract class Mustache_Cache_AbstractCache implements Mustache_Cache
 {
     private $logger = null;
 
+    /**
+     * Get the current logger instance.
+     *
+     * @return Mustache_Logger|Psr\Log\LoggerInterface
+     */
     public function getLogger()
     {
         return $this->logger;
     }
 
+    /**
+     * Set a logger instance.
+     *
+     * @param Mustache_Logger|Psr\Log\LoggerInterface $logger
+     */
     public function setLogger($logger = null)
     {
         if ($logger !== null && !($logger instanceof Mustache_Logger || is_a($logger, 'Psr\\Log\\LoggerInterface'))) {
@@ -34,6 +44,13 @@ abstract class Mustache_Cache_AbstractCache implements Mustache_Cache
         $this->logger = $logger;
     }
 
+    /**
+     * Add a log record if logging is enabled.
+     *
+     * @param integer $level   The logging level
+     * @param string  $message The log message
+     * @param array   $context The log context
+     */
     protected function log($level, $message, array $context = array())
     {
         if (isset($this->logger)) {