don't eat up backslashes. fixes #59

src/Handlebars/Tokenizer.php

@@ -127,6 +127,10 @@ class Tokenizer
 
             $this->escaping = $this->tagChange(self::T_ESCAPE, $text, $i);
 
+            if ( $this->escaped and $text[$i + 1] != self::T_UNESCAPED ) {
+                $this->buffer .= "\\";
+            }
+
             switch ($this->state) {
             case self::IN_TEXT:
                 if ($this->tagChange(self::T_UNESCAPED.$this->otag, $text, $i) and $this->escaped) {

tests/Xamin/HandlebarsTest.php

@@ -137,6 +137,11 @@ class HandlebarsTest extends \PHPUnit_Framework_TestCase
                 array('data' => 'foo'),
                 '{{{data}}}'
             ),
+            array(
+                '\pi',
+                array(),
+                '\pi'
+            ),
         );
     }