Fix dquote string escape sequences.

parser/src/scanner.rs

@@ -1986,7 +1986,7 @@ impl<T: Iterator<Item = char>> Scanner<T> {
             'e' => ret = '\x1b',
             ' ' => ret = '\x20',
             '"' => ret = '"',
-            '\'' => ret = '\'',
+            '/' => ret = '/',
             '\\' => ret = '\\',
             // Unicode next line (#x85)
             'N' => ret = char::from_u32(0x85).unwrap(),

parser/tests/yaml-test-suite.rs

@@ -315,8 +315,6 @@ fn expected_events(expected_tree: &str) -> Vec<String> {
 #[rustfmt::skip]
 static EXPECTED_FAILURES: &[&str] = &[
     // Misc
-    "3UYS", // Escaped /
-    "HRE5", // Escaped ' in double-quoted (should not work)
     "QB6E", // Indent for multiline double-quoted scalar
     "S98Z", // Block scalar and indent problems?
     "U99R", // Comma is not allowed in tags