upstream-master の変更を取り込み

Author: TonalidadeHidrica

src/rust-2021/default-cargo-resolver.md

@@ -354,7 +354,7 @@ bstr v0.2.16
 
 <!--
 This snippet of output shows that the project `foo` depends on `bar` with the "default" feature.
-Then, `bar` depends on `bstr` as a build-dependency with the "default" feature
+Then, `bar` depends on `bstr` as a build-dependency with the "default" feature.
 We can further see that `bstr`'s  "default" feature enables "unicode" (among other features).
 -->
 

src/rust-2021/prelude.md

@@ -75,7 +75,7 @@ We can fix this by using fully qualified syntax:
 ```rust,ignore
 fn main() {
   // Now it is clear which trait method we're referring to
-  <Vec<i32> as MyTrait<()>::from_iter(None);
+  <Vec<i32> as MyTrait<()>>::from_iter(None);
 }
 ```