Minor type in CONTRIBUTING.md

A single missing article

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 60935770781817a63c3ea9b6a19260ee33118b54..4e6cd6c9782a95872376db0ff294cd4f1d88523c 100644 (file)
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -230,7 +230,7 @@ To find documentation-related issues, sort by the [A-docs label][adocs].
 In many cases, you don't need a full `make doc`. You can use `rustdoc` directly
 to check small fixes. For example, `rustdoc src/doc/reference.md` will render
 reference to `doc/reference.html`. The CSS might be messed up, but you can
-verify that HTML is right.
+verify that the HTML is right.
 
 ## Issue Triage