Vendor dependencies for 0.3.0 release

vendor/winnow/src/_topic/lexing.rs

@@ -0,0 +1,23 @@
+//! # Lexing and Parsing
+//!
+//! ## Parse to AST
+//!
+//! The simplest way to write a parser is to parse directly to the AST.
+//!
+//! Example:
+//! ```rust
+#![doc = include_str!("../../examples/arithmetic/parser_ast.rs")]
+//! ```
+//!
+//! ## Lexing
+//!
+//! However, there are times when you may want to separate lexing from parsing.
+//! Winnow provides [`TokenSlice`] to simplify this.
+//!
+//! Example:
+//! ```rust
+#![doc = include_str!("../../examples/arithmetic/parser_lexer.rs")]
+//! ```
+
+#![allow(unused_imports)]
+use crate::stream::TokenSlice;