chore: checkpoint before Python removal

vendor/nom/tests/escaped.rs

@@ -0,0 +1,28 @@
+use nom::bytes::complete::escaped;
+use nom::character::complete::digit1;
+use nom::character::complete::one_of;
+use nom::{error::ErrorKind, Err, IResult};
+
+fn esc(s: &str) -> IResult<&str, &str, (&str, ErrorKind)> {
+  escaped(digit1, '\\', one_of("\"n\\"))(s)
+}
+
+#[cfg(feature = "alloc")]
+fn esc_trans(s: &str) -> IResult<&str, String, (&str, ErrorKind)> {
+  use nom::bytes::complete::{escaped_transform, tag};
+  escaped_transform(digit1, '\\', tag("n"))(s)
+}
+
+#[test]
+fn test_escaped() {
+  assert_eq!(esc("abcd"), Err(Err::Error(("abcd", ErrorKind::Escaped))));
+}
+
+#[test]
+#[cfg(feature = "alloc")]
+fn test_escaped_transform() {
+  assert_eq!(
+    esc_trans("abcd"),
+    Err(Err::Error(("abcd", ErrorKind::EscapedTransform)))
+  );
+}