Prevent confusing behavior when reindeer buckify is run from repo root

dtolnay · dtolnay · commit 597555c4b974 · 2023-08-14T20:49:53.000-07:00
diff --git a/reindeer.toml b/reindeer.toml
@@ -0,0 +1 @@
+error = "This is the wrong directory. Run `reindeer buckify` in the third-party directory."

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+error = "This is the wrong directory. Run `reindeer buckify` in the third-party directory."