Fix spelling (#3125)

include/nlohmann/detail/input/binary_reader.hpp

@@ -42,7 +42,7 @@ enum class cbor_tag_handler_t
 
 @note from https://stackoverflow.com/a/1001328/266378
 */
-static inline bool little_endianess(int num = 1) noexcept
+static inline bool little_endianness(int num = 1) noexcept
 {
     return *reinterpret_cast<char*>(&num) == 1;
 }
@@ -2341,7 +2341,7 @@ class binary_reader
 
     @return whether conversion completed
 
-    @note This function needs to respect the system's endianess, because
+    @note This function needs to respect the system's endianness, because
           bytes in CBOR, MessagePack, and UBJSON are stored in network order
           (big endian) and therefore need reordering on little endian systems.
     */
@@ -2514,8 +2514,8 @@ class binary_reader
     /// the number of characters read
     std::size_t chars_read = 0;
 
-    /// whether we can assume little endianess
-    const bool is_little_endian = little_endianess();
+    /// whether we can assume little endianness
+    const bool is_little_endian = little_endianness();
 
     /// the SAX parser
     json_sax_t* sax = nullptr;

include/nlohmann/detail/input/input_adapters.hpp

@@ -450,7 +450,7 @@ auto input_adapter(T (&array)[N]) -> decltype(input_adapter(array, array + N)) /
 }
 
 // This class only handles inputs of input_buffer_adapter type.
-// It's required so that expressions like {ptr, len} can be implicitely casted
+// It's required so that expressions like {ptr, len} can be implicitly casted
 // to the correct adapter.
 class span_input_adapter
 {