trpl: fix link from Structs to Traits

diff --git a/src/doc/trpl/structs.md b/src/doc/trpl/structs.md
index ad7ead9319989f2339a5dae9f0b89bb15812ffa4..5729aeefbac9cdb39c88c80e3472dd950e14202b 100644 (file)
--- a/src/doc/trpl/structs.md
+++ b/src/doc/trpl/structs.md
@@ -196,3 +196,5 @@ useful. For instance, a library may ask you to create a structure that
 implements a certain [trait][trait] to handle events. If you don’t have
 any data you need to store in the structure, you can just create a
 unit-like struct.
+
+[trait]: traits.html