Stop implicitly adding &'input to input type

Author: kevinmehall

README.md

@@ -20,7 +20,7 @@ Parse a comma-separated list of numbers surrounded by brackets into a `Vec<u32>`
 
 ```rust
 peg::parser!{
-  grammar list_parser() for str {
+  grammar list_parser() for &str {
     rule number() -> u32
       = n:$(['0'..='9']+) {? n.parse().or(Err("u32")) }
 

benches/expr.rs

@@ -5,7 +5,7 @@ extern crate test;
 
 use test::Bencher;
 
-peg::parser!(grammar parser() for str {
+peg::parser!(grammar parser() for &str {
 crate rule expr() = eq()
 
 #[cache]

benches/json.rs

@@ -5,7 +5,7 @@ extern crate test;
 
 use test::Bencher;
 
-peg::parser!(grammar parser() for str {
+peg::parser!(grammar parser() for &str {
 // JSON grammar (RFC 4627). Note that this only checks for valid JSON and does not build a syntax
 // tree.