New upstream version 1.50.0+dfsg1

[rustc.git] / src / doc / book / src / ch12-05-working-with-environment-variables.md

diff --git a/src/doc/book/src/ch12-05-working-with-environment-variables.md b/src/doc/book/src/ch12-05-working-with-environment-variables.md
index d6ac076ebcee273ef174fddf3589e8085fd1a1b7..86457e83854e049688a01daab1aab43dbc58edfc 100644 (file)
--- a/src/doc/book/src/ch12-05-working-with-environment-variables.md
+++ b/src/doc/book/src/ch12-05-working-with-environment-variables.md
@@ -18,7 +18,7 @@ tests, as shown in Listing 12-20.
 
 <span class="filename">Filename: src/lib.rs</span>
 
-```rust
+```rust,noplayground
 {{#rustdoc_include ../listings/ch12-an-io-project/listing-12-20/src/lib.rs:here}}
 ```
 
@@ -50,7 +50,7 @@ they’ll be the same case when we check whether the line contains the query.
 
 <span class="filename">Filename: src/lib.rs</span>
 
-```rust
+```rust,noplayground
 {{#rustdoc_include ../listings/ch12-an-io-project/listing-12-21/src/lib.rs:here}}
 ```
 
@@ -120,7 +120,7 @@ in Listing 12-23.
 
 <span class="filename">Filename: src/lib.rs</span>
 
-```rust
+```rust,noplayground
 {{#rustdoc_include ../listings/ch12-an-io-project/listing-12-23/src/lib.rs:here}}
 ```