chore: checkpoint before Python removal

vendor/nom/tests/multiline.rs

@@ -0,0 +1,31 @@
+use nom::{
+  character::complete::{alphanumeric1 as alphanumeric, line_ending as eol},
+  multi::many,
+  sequence::terminated,
+  IResult, Parser,
+};
+
+pub fn end_of_line(input: &str) -> IResult<&str, &str> {
+  if input.is_empty() {
+    Ok((input, input))
+  } else {
+    eol(input)
+  }
+}
+
+pub fn read_line(input: &str) -> IResult<&str, &str> {
+  terminated(alphanumeric, end_of_line).parse(input)
+}
+
+pub fn read_lines(input: &str) -> IResult<&str, Vec<&str>> {
+  many(0.., read_line).parse(input)
+}
+
+#[cfg(feature = "alloc")]
+#[test]
+fn read_lines_test() {
+  let res = Ok(("", vec!["Duck", "Dog", "Cow"]));
+
+  assert_eq!(read_lines("Duck\nDog\nCow\n"), res);
+  assert_eq!(read_lines("Duck\nDog\nCow"), res);
+}