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/document_data.hpp

@@ -63,19 +63,19 @@ struct document_data
     /// entries), whose entries link to the values.
     struct edit_state
     {
-        std::vector<node*> moved{};                    ///< element sequences of moved arrays/objects (header node first)
-        std::vector<std::size_t> moved_cap{};          ///< capacity in nodes of a growable block; 0: a fixed sequence (a new value)
-        std::vector<std::unique_ptr<node[]>> chunks{}; ///< storage of new values and blocks; never moved
-        std::map<const node*, node*, std::less<const node*>> regions{}; ///< new arrays/objects: root -> container that uses it as its element sequence (nullptr: linked from a block)
+        std::vector<node*> moved{};                    ///< element sequences of moved arrays/objects (header node first) // NOLINT(readability-redundant-member-init)
+        std::vector<std::size_t> moved_cap{};          ///< capacity in nodes of a growable block; 0: a fixed sequence (a new value) // NOLINT(readability-redundant-member-init)
+        std::vector<std::unique_ptr<node[]>> chunks{}; ///< storage of new values and blocks; never moved // NOLINT(readability-redundant-member-init,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
+        std::map<const node*, node*, std::less<const node*>> regions{}; ///< new arrays/objects: root -> container that uses it as its element sequence (nullptr: linked from a block) // NOLINT(readability-redundant-member-init)
         node* chunk_cur = nullptr;
         node* chunk_end = nullptr;
         std::size_t chunk_next = 64;
-        std::vector<std::unique_ptr<char[]>> texts{}; ///< edit arena, the current buffer last; earlier ones stay alive for string views
+        std::vector<std::unique_ptr<char[]>> texts{}; ///< edit arena, the current buffer last; earlier ones stay alive for string views // NOLINT(readability-redundant-member-init,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
         std::size_t text_used = 0;
         std::size_t text_cap = 0;
         std::size_t bytes = 0; ///< memory held by edits
     };
-    std::unique_ptr<edit_state> edits{}; ///< created by the first edit
+    std::unique_ptr<edit_state> edits{}; ///< created by the first edit // NOLINT(readability-redundant-member-init)
 
     /// one allocation for the header and room for `nodes` nodes; large
     /// documents get a separate node array instead (so it can be trimmed)