Fix a broken markup.
It was broken at unknown commit.
@@ -2178,7 +2178,7 @@ a user-friendly way.
<code>bazel run</code> can also execute test binaries, which has the effect of
running the test in a close approximation of the environment described at
<a href='test-encyclopedia.html'>Writing Tests</a>. Note that none of the
- <code>--test_*</code>code> arguments have an effect when running a test in this manner except
+ <code>--test_*</code> arguments have an effect when running a test in this manner except
<code>--test_arg</code> .
</p>
