diff --git a/include/fmt/core.h b/include/fmt/core.h
index d7f3d726..4893ba97 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -227,11 +227,11 @@
 
 // libc++ supports string_view in pre-c++17.
 #if (FMT_HAS_INCLUDE(<string_view>) &&                       \
-     (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
+     (__cplusplus > 201402L && defined(_LIBCPP_VERSION))) || \
     (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
 #  include <string_view>
 #  define FMT_USE_STRING_VIEW
-// libstdc++ supports experimental/string_view in c++14
+// libstdc++ supports experimental/string_view in c++14.
 #elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
 #  include <experimental/string_view>
 #  define FMT_USE_EXPERIMENTAL_STRING_VIEW
@@ -847,7 +847,7 @@ template <typename T = char> class counting_buffer : public buffer<T> {
 template <typename T>
 class buffer_appender : public std::back_insert_iterator<buffer<T>> {
   using base = std::back_insert_iterator<buffer<T>>;
-
+ 
  public:
   explicit buffer_appender(buffer<T>& buf) : base(buf) {}
   buffer_appender(base it) : base(it) {}