Fix CI, again (#4083)

include/nlohmann/detail/input/input_adapters.hpp

@@ -71,7 +71,6 @@ class file_input_adapter
     std::FILE* m_file;
 };
 
-
 /*!
 Input adapter for a (caching) istream. Ignores a UFT Byte Order Mark at
 beginning of input. Does not support changing the underlying std::streambuf
@@ -170,7 +169,6 @@ class iterator_input_adapter
     }
 };
 
-
 template<typename BaseInputAdapter, size_t T>
 struct wide_string_input_helper;
 
@@ -339,7 +337,6 @@ class wide_string_input_adapter
     std::size_t utf8_bytes_filled = 0;
 };
 
-
 template<typename IteratorType, typename Enable = void>
 struct iterator_input_adapter_factory
 {