CGAL: support version 6.0

- Update formatting for cpplint.

Signed-off-by: Rhys Mainwaring <[email protected]>

gz-waves/include/gz/waves/Algorithm.hh

@@ -87,11 +87,11 @@ std::array<Index, N> sort_indexes(const std::array<T, N>& v) {
 ///
 template<typename T, typename Iterator, typename Idx>
 void unordered_unique(
-    Iterator first, Iterator last,
-    std::vector<T>* unique,
-    std::vector<Idx>* index = nullptr,
-    std::vector<Idx>* inverse = nullptr,
-    std::vector<Idx>* count = nullptr)
+  Iterator first, Iterator last,
+  std::vector<T>* unique,
+  std::vector<Idx>* index = nullptr,
+  std::vector<Idx>* inverse = nullptr,
+  std::vector<Idx>* count = nullptr)
 {
   using index_map = std::unordered_map<T, Idx>;
   using map_iter = typename index_map::iterator;