properly strip enclosing quotes within ['foo'] in some edge cases

lib/Dwoo/Compiler.php

@@ -2094,8 +2094,8 @@ class Dwoo_Compiler implements Dwoo_ICompiler
 				$pointer += $matchedLength;
 			}
 
-			// replace useless brackets by dot accessed vars
-			$key = preg_replace('#\[([^$%\[.>-]+)\]#', '.$1', $key);
+			// replace useless brackets by dot accessed vars and strip enclosing quotes if present
+			$key = preg_replace('#\[(["\']?)([^$%\[.>-]+)\1\]#', '.$2', $key);
 
 			// prevent $foo->$bar calls because it doesn't seem worth the trouble
 			if (strpos($key, '->$') !== false) {

lib/Dwoo/Core.php

@@ -1249,6 +1249,9 @@ class Dwoo_Core
 
         while (list($k, $sep) = each($m[1])) {
             if ($sep === '.' || $sep === '[' || $sep === '') {
+                // strip enclosing quotes if present
+                $m[2][$k] = preg_replace('#^(["\']?)(.*?)\1$#', '$2', $m[2][$k]);
+
                 if ((is_array($data) || $data instanceof ArrayAccess) && ($safeRead === false || isset($data[$m[2][$k]]))) {
                     $data = $data[$m[2][$k]];
                 } else {