reference: mark that up to make it more clear it is a keyword

1 files changed, 1 insertions, 1 deletions

diff --git a/src/doc/reference.md b/src/doc/reference.md
index 717c99901d1..6035f936c6c 100644
--- a/src/doc/reference.md
+++ b/src/doc/reference.md
@@ -3087,7 +3087,7 @@ loops](#infinite-loops), [break expressions](#break-expressions), and
 A `for` expression is a syntactic construct for looping over elements provided
 by an implementation of `std::iter::IntoIterator`.
 
-An example of a for loop over the contents of an array:
+An example of a `for` loop over the contents of an array:
 
 ```
 # type Foo = i32;