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diff --git a/src/libproc_macro_tokens/lib.rs b/src/libproc_macro_tokens/lib.rs
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-// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! # Proc_Macro
-//!
-//! A library for procedural macro writers.
-//!
-//! ## Usage
-//! This crate provides the prelude (at libproc_macro_tokens::prelude), which
-//! provides a number of operations:
-//! - `concat`, for concatenating two TokenStreams.
-//! - `ident_eq`, for checking if two identifiers are equal regardless of syntax context.
-//! - `str_to_token_ident`, for converting an `&str` into a Token.
-//! - `keyword_to_token_delim`, for converting a `parse::token::keywords::Keyword` into a
-//!    Token.
-//! - `build_delimited`, for creating a new TokenStream from an existing one and a delimiter
-//!    by wrapping the TokenStream in the delimiter.
-//! - `build_bracket_delimited`, `build_brace_delimited`, and `build_paren_delimited`, for
-//!    easing the above.
-//! - `build_empty_args`, which returns a TokenStream containing `()`.
-//! - `lex`, which takes an `&str` and returns the TokenStream it represents.
-//!
-//! ## TokenStreams
-//!
-//! TokenStreams serve as the basis of the macro system. They are, in essence, vectors of
-//! TokenTrees, where indexing treats delimited values as a single term. That is, the term
-//! `even(a+c) && even(b)` will be indexibly encoded as `even | (a+c) | even | (b)` where,
-//! in reality, `(a+c)` is actually a decorated pointer to `a | + | c`.
-//!
-//! If a user has a TokenStream that is a single, delimited value, they can use
-//! `maybe_delimited` to destruct it and receive the internal vector as a new TokenStream
-//! as:
-//! ```
-//! `(a+c)`.maybe_delimited() ~> Some(a | + | c)`
-//! ```
-//!
-//! Check the TokenStream documentation for more information; the structure also provides
-//! cheap concatenation and slicing.
-//!
-
-#![crate_name = "proc_macro_tokens"]
-#![unstable(feature = "rustc_private", issue = "27812")]
-#![crate_type = "dylib"]
-#![crate_type = "rlib"]
-#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
-       html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
-       html_root_url = "https://doc.rust-lang.org/nightly/")]
-#![deny(warnings)]
-
-#![feature(staged_api)]
-#![feature(rustc_private)]
-
-extern crate syntax;
-
-pub mod build;
-pub mod parse;
-pub mod prelude;