diff --git a/src/doc/trpl/documentation.md b/src/doc/trpl/documentation.md
index 746558b3b944..7d9d6aa39f85 100644
--- a/src/doc/trpl/documentation.md
+++ b/src/doc/trpl/documentation.md
@@ -382,7 +382,7 @@ $ rustdoc --test path/to/my/crate/root.rs
 $ cargo test
 ```
 
-That's right, `cargo test` tests embedded documentation too. However, 
+That's right, `cargo test` tests embedded documentation too. However,
 `cargo test` will not test binary crates, only library ones. This is
 due to the way `rustdoc` works: it links against the library to be tested,
 but with a binary, there’s nothing to link to.