Recover a link that seems to have been lost in a doc migration.

--
PiperOrigin-RevId: 150783779
MOS_MIGRATED_REVID=150783779
diff --git a/site/versions/master/docs/skylark/build-style.md b/site/versions/master/docs/skylark/build-style.md
index 71cb3ee..d778759 100644
--- a/site/versions/master/docs/skylark/build-style.md
+++ b/site/versions/master/docs/skylark/build-style.md
@@ -96,7 +96,7 @@
  * Implicit string concatenation is not supported. Use the `+` operator.
    *Rationale*: `BUILD` files contain many string lists. It is easy to forget a
    comma, which leads to a complete different result. This has created many bugs
-   in the past. See also this discussion.
+   in the past. [See also this discussion.](https://lwn.net/Articles/551438/)
 
  * Use spaces around the `=` sign for keywords arguments in rules. *Rationale*:
    Named arguments are much more frequent than in Python and are always on a