update original

Author: funkill

rustbook-en/src/ch17-05-traits-for-async.md

@@ -131,7 +131,7 @@ yet ready.
 
 Back in Listing 17-13, we used the `trpl::join!` macro to await three
 futures. However, it’s common to have a collection such as a vector containing
-some number futures that won’t be known until runtime. Let’s change Listing
+some number of futures that won’t be known until runtime. Let’s change Listing
 17-13 to the code in Listing 17-23 that puts the three futures into a vector
 and calls the `trpl::join_all` function instead, which won’t compile yet.
 

rustbook-en/src/ch17-06-futures-tasks-threads.md

@@ -99,7 +99,7 @@ Next, we’ll talk about idiomatic ways to model problems and structure solution
 as your Rust programs get bigger. In addition, we’ll discuss how Rust’s idioms
 relate to those you might be familiar with from object-oriented programming.
 
-[ch16]: http://localhost:3000/ch16-00-concurrency.html
+[ch16]: ch16-00-concurrency.html
 [combining-futures]: ch17-03-more-futures.html#building-our-own-async-abstractions
 [streams]: ch17-04-streams.html#composing-streams
 [ch21]: ch21-00-final-project-a-web-server.html