Fix for \n newline handling

Fix parser escaping tests

Author: danmichaelo

src/Parser.php

@@ -134,6 +134,8 @@ private static function parseValue($value)
                 case self::ESCAPE_STATE:
                     if ($char === $value[0] || $char === '\\') {
                         return [$data[0].$char, self::QUOTED_STATE];
+                    } elseif (in_array($char, ['n', 'r'], true)) {
+                        return [$data[0].stripcslashes('\\' . $char), self::QUOTED_STATE];
                     } else {
                         throw new InvalidFileException(
                             self::getErrorMessage('an unexpected escape sequence', $value)

tests/Dotenv/ParserTest.php

@@ -62,19 +62,19 @@ public function testParseInvalidName()
 
     /**
      * @expectedException \Dotenv\Exception\InvalidFileException
-     * @expectedExceptionMessage Failed to parse dotenv file due to an unexpected escape sequence. Failed at ["iiiiviiiixiiiiviiii\n"].
+     * @expectedExceptionMessage Failed to parse dotenv file due to an unexpected escape sequence. Failed at ["iiiiviiiixiiiiviiii\a"].
      */
     public function testParserEscapingDouble()
     {
-        Parser::parse('FOO_BAD="iiiiviiiixiiiiviiii\\n"');
+        Parser::parse('FOO_BAD="iiiiviiiixiiiiviiii\\a"');
     }
 
     /**
      * @expectedException \Dotenv\Exception\InvalidFileException
-     * @expectedExceptionMessage Failed to parse dotenv file due to an unexpected escape sequence. Failed at ['iiiiviiiixiiiiviiii\n'].
+     * @expectedExceptionMessage Failed to parse dotenv file due to an unexpected escape sequence. Failed at ['iiiiviiiixiiiiviiii\a'].
      */
     public function testParserEscapingSingle()
     {
-        Parser::parse('FOO_BAD=\'iiiiviiiixiiiiviiii\\n\'');
+        Parser::parse('FOO_BAD=\'iiiiviiiixiiiiviiii\\a\'');
     }
 }