Add sprintf_format instantiations and remove syntactic noise

include/fmt/core.h

@@ -411,7 +411,6 @@ class basic_string_view {
   }
   friend bool operator<(basic_string_view lhs, basic_string_view rhs) {
     return lhs.compare(rhs) < 0;
-
   }
   friend bool operator<=(basic_string_view lhs, basic_string_view rhs) {
     return lhs.compare(rhs) <= 0;

src/format.cc

@@ -28,6 +28,11 @@ template FMT_API int internal::char_traits<char>::format_float(
 template FMT_API std::string internal::vformat<char>(
     string_view, basic_format_args<format_context>);
 
+template FMT_API void internal::sprintf_format(
+    double, internal::buffer &, core_format_specs);
+template FMT_API void internal::sprintf_format(
+    long double, internal::buffer &, core_format_specs);
+
 // Explicit instantiations for wchar_t.
 
 template FMT_API wchar_t internal::thousands_sep(locale_provider *);