treewide: format repo with buildifier

Change-Id: Ia7aebeb7bba5b119c9157d1ad805cc477bcbb68a
Reviewed-on: https://review.monogon.dev/c/monogon/+/3774
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/build/utils/detect_root.bzl b/build/utils/detect_root.bzl
index 50c9574..e52c6ca 100644
--- a/build/utils/detect_root.bzl
+++ b/build/utils/detect_root.bzl
@@ -57,7 +57,7 @@
 
 def _get_level(path):
     normalized = path
-    for i in range(len(path)):
+    for _ in range(len(path)):
         new_normalized = normalized.replace("//", "/")
         if len(new_normalized) == len(normalized):
             break