update_engine: Run clang-format on ./ (root directory)

BUG=none
TEST=unittest

Change-Id: Ibd075dc7ea9a18e798f612e35725f1c83c112809
Reviewed-on: https://chromium-review.googlesource.com/1409708
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/fake_file_writer.h b/fake_file_writer.h
index 43b71c7..75507ea 100644
--- a/fake_file_writer.h
+++ b/fake_file_writer.h
@@ -56,9 +56,7 @@
     return 0;
   }
 
-  const brillo::Blob& bytes() {
-    return bytes_;
-  }
+  const brillo::Blob& bytes() { return bytes_; }
 
  private:
   // The internal store of all bytes that have been written