Removes extra .

diff --git a/src/doc/guide.md b/src/doc/guide.md
index 7f65839bb1096eee094f423fc9c0876bd98e520e..53e27c4b25b38d734bc11f86ffc024c23aab07be 100644 (file)
--- a/src/doc/guide.md
+++ b/src/doc/guide.md
@@ -3621,7 +3621,7 @@ let x = box 5i;
 ```
 
 This allocates an integer `5` on the heap, and creates a binding `x` that
-refers to it.. The great thing about boxed pointers is that we don't have to
+refers to it. The great thing about boxed pointers is that we don't have to
 manually free this allocation! If we write
 
 ```{rust}