Use correct indefinite article in reference.md

diff --git a/src/doc/reference.md b/src/doc/reference.md
index 284fcf6aed0c20df1de9088fbf6dbb2a83014b0f..70e3145903fbfc46ea20b89760dcb71d1748023b 100644 (file)
--- a/src/doc/reference.md
+++ b/src/doc/reference.md
@@ -1452,7 +1452,7 @@ fn draw_twice<T: Shape>(surface: Surface, sh: T) {
 }
 ```
 
-Traits also define an [trait object](#trait-objects) with the same
+Traits also define a [trait object](#trait-objects) with the same
 name as the trait. Values of this type are created by coercing from a
 pointer of some specific type to a pointer of trait type. For example,
 `&T` could be coerced to `&Shape` if `T: Shape` holds (and similarly