changed hyphens to en-dashes

Author: Alexander Regueiro

src/the-parser.md

@@ -9,8 +9,8 @@ The bulk of the parser lives in the [libsyntax] crate.
 
 Like most parsers, the parsing process is composed of two main steps,
 
-- lexical analysis - turn a stream of characters into a stream of token trees
-- parsing - turn the token trees into an AST
+- lexical analysis – turn a stream of characters into a stream of token trees
+- parsing – turn the token trees into an AST
 
 The `syntax` crate contains several main players,
 
@@ -39,4 +39,4 @@ all the information needed while parsing, as well as the `CodeMap` itself.
 [parser module]: https://github.com/rust-lang/rust/tree/master/src/libsyntax/parse
 [`Parser`]: https://github.com/rust-lang/rust/blob/master/src/libsyntax/parse/parser.rs
 [`StringReader`]: https://github.com/rust-lang/rust/blob/master/src/libsyntax/parse/lexer/mod.rs
-[visit module]: https://github.com/rust-lang/rust/blob/master/src/libsyntax/visit.rs
+[visit module]: https://github.com/rust-lang/rust/blob/master/src/libsyntax/visit.rs