Upgrade formatting to clang-format 10 (#5895)

* Update formatting tools to clang-format-10

* Reformat using clang-format-10.0.09

unit_tests/util/group_by.cpp

@@ -34,7 +34,7 @@ struct SubRangeCounter
     template <typename Range> void operator()(Range &&) { count += 1; }
     std::size_t count = 0;
 };
-}
+} // namespace
 
 BOOST_AUTO_TEST_CASE(grouped_empty_test)
 {

unit_tests/util/serialization.cpp

@@ -88,7 +88,9 @@ BOOST_AUTO_TEST_CASE(tar_serialize_variable_indexed_data)
             {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17},
             {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}};
         std::vector<std::string> char_data = {
-            "HalloFoo", "ABCDEFGHIJKLMNOPQR", "ABCDEFGHIJKLMNOP",
+            "HalloFoo",
+            "ABCDEFGHIJKLMNOPQR",
+            "ABCDEFGHIJKLMNOP",
         };
 
         for (const auto i : util::irange<std::size_t>(0, offset_data.size()))