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Clarify text about futures in a vector #4794

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9 changes: 5 additions & 4 deletions src/ch17-05-traits-for-async.md
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Expand Up @@ -130,10 +130,11 @@ yet ready.
### The `Pin` Type and the `Unpin` Trait

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
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.
futures. However, it’s common to have a collection, such as a vector,
containing many futures the exact number of which 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.

<Listing number="17-23" caption="Awaiting futures in a collection" file-name="src/main.rs">

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