[Yaml] Fixed double quotes escaping in Dumper.

src/Symfony/Component/Yaml/Escaper.php

@@ -25,13 +25,13 @@ class Escaper
     // first to ensure proper escaping because str_replace operates iteratively
     // on the input arrays. This ordering of the characters avoids the use of strtr,
     // which performs more slowly.
-    static private $escapees = array('\\\\', '\\"',
+    static private $escapees = array('\\\\', '\\"', '"',
                                      "\x00",  "\x01",  "\x02",  "\x03",  "\x04",  "\x05",  "\x06",  "\x07",
                                      "\x08",  "\x09",  "\x0a",  "\x0b",  "\x0c",  "\x0d",  "\x0e",  "\x0f",
                                      "\x10",  "\x11",  "\x12",  "\x13",  "\x14",  "\x15",  "\x16",  "\x17",
                                      "\x18",  "\x19",  "\x1a",  "\x1b",  "\x1c",  "\x1d",  "\x1e",  "\x1f",
                                      "\xc2\x85", "\xc2\xa0", "\xe2\x80\xa8", "\xe2\x80\xa9");
-    static private $escaped  = array('\\"', '\\\\',
+    static private $escaped  = array('\\"', '\\\\', '\\"',
                                      "\\0",   "\\x01", "\\x02", "\\x03", "\\x04", "\\x05", "\\x06", "\\a",
                                      "\\b",   "\\t",   "\\n",   "\\v",   "\\f",   "\\r",   "\\x0e", "\\x0f",
                                      "\\x10", "\\x11", "\\x12", "\\x13", "\\x14", "\\x15", "\\x16", "\\x17",

tests/Symfony/Tests/Component/Yaml/Fixtures/escapedCharacters.yml

@@ -137,3 +137,11 @@ yaml: |
     \x41 \u0041 \U00000041"
 php: |
     "Fun with \x5C\n\x22 \x07 \x08 \x1B \x0C\n\x0A \x0D \x09 \x0B \x00\n\x20 \xA0 \x85 \xe2\x80\xa8 \xe2\x80\xa9\nA A A"
+---
+test: Double quotes with a line feed
+yaml: |
+   { double: "some value\n \"some quoted string\" and 'some single quotes one'" }
+php: |
+    array(
+        'double' => "some value\n \"some quoted string\" and 'some single quotes one'"
+    )