Address the clang-tidy findings of the editable documents

Pick the overloads of encode() with a first_true trait instead of
nested conditionals, name the pointer type in the copies of links,
mark the owning pointers of the edit storage, and compare doubles
by their bits in the tests.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

include/nlohmann/detail/view/edit_storage.hpp

@@ -39,7 +39,7 @@ inline document_data::edit_state& edit_state_of(document_data& d)
 {
     if (!d.edits)
     {
-        d.edits.reset(new document_data::edit_state());
+        d.edits.reset(new document_data::edit_state()); // NOLINT(cppcoreguidelines-owning-memory): owned by the unique_ptr
     }
     return *d.edits;
 }
@@ -51,7 +51,7 @@ inline node* alloc_nodes(document_data& d, std::size_t k)
     if (NLOHMANN_VIEW_UNLIKELY(static_cast<std::size_t>(e.chunk_end - e.chunk_cur) < k))
     {
         const std::size_t count = (std::max)(k, e.chunk_next);
-        std::unique_ptr<node[]> fresh(new node[count]());
+        std::unique_ptr<node[]> fresh(new node[count]()); // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
         e.chunks.push_back(std::move(fresh));
         e.chunk_cur = e.chunks.back().get();
         e.chunk_end = e.chunk_cur + count;
@@ -75,7 +75,7 @@ inline std::uint32_t append_text(document_data& d, const char* s, std::size_t n)
         {
             throw_out_of_range(416, "edits of 4 GiB or more are not supported by json_document");
         }
-        std::unique_ptr<char[]> fresh(new char[cap]);
+        std::unique_ptr<char[]> fresh(new char[cap]); // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
         if (e.text_used != 0)
         {
             std::memcpy(fresh.get(), e.texts.back().get(), e.text_used);