Consistently use fmt:: when invoking format_to. (#3779)

This has been done partially in previous commits:

* 2ac6c5ca8b
* 258000064d
* ba50c19e82
* 5ab9d39253

A patch that includes the `std::error_code` changes here is
upstream in vcpkg, so that will be able to be removed when
updating to the next release.

include/fmt/chrono.h

@@ -1156,7 +1156,7 @@ void write_floating_seconds(memory_buffer& buf, Duration duration,
       num_fractional_digits = 6;
   }
 
-  format_to(std::back_inserter(buf), FMT_STRING("{:.{}f}"),
+  fmt::format_to(std::back_inserter(buf), FMT_STRING("{:.{}f}"),
                  std::fmod(val * static_cast<rep>(Duration::period::num) /
                                static_cast<rep>(Duration::period::den),
                            static_cast<rep>(60)),

include/fmt/compile.h

@@ -492,7 +492,8 @@ auto format_to_n(OutputIt out, size_t n, const S& format_str, Args&&... args)
     -> format_to_n_result<OutputIt> {
   using traits = detail::fixed_buffer_traits;
   auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
-  format_to(std::back_inserter(buf), format_str, std::forward<Args>(args)...);
+  fmt::format_to(std::back_inserter(buf), format_str,
+                 std::forward<Args>(args)...);
   return {buf.out(), buf.count()};
 }
 

include/fmt/format-inl.h

@@ -58,8 +58,8 @@ FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
   error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
   auto it = buffer_appender<char>(out);
   if (message.size() <= inline_buffer_size - error_code_size)
-    format_to(it, FMT_STRING("{}{}"), message, SEP);
+    fmt::format_to(it, FMT_STRING("{}{}"), message, SEP);
-  format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
+  fmt::format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
   FMT_ASSERT(out.size() <= inline_buffer_size, "");
 }
 
@@ -1379,14 +1379,14 @@ template <> struct formatter<detail::bigint> {
     for (auto i = n.bigits_.size(); i > 0; --i) {
       auto value = n.bigits_[i - 1u];
       if (first) {
-        out = format_to(out, FMT_STRING("{:x}"), value);
+        out = fmt::format_to(out, FMT_STRING("{:x}"), value);
         first = false;
         continue;
       }
-      out = format_to(out, FMT_STRING("{:08x}"), value);
+      out = fmt::format_to(out, FMT_STRING("{:08x}"), value);
     }
     if (n.exp_ > 0)
-      out = format_to(out, FMT_STRING("p{}"),
+      out = fmt::format_to(out, FMT_STRING("p{}"),
                            n.exp_ * detail::bigint::bigit_bits);
     return out;
   }

include/fmt/format.h

@@ -867,7 +867,7 @@ enum { inline_buffer_size = 500 };
   **Example**::
 
      auto out = fmt::memory_buffer();
-     format_to(std::back_inserter(out), "The answer is {}.", 42);
+     fmt::format_to(std::back_inserter(out), "The answer is {}.", 42);
 
   This will append the following output to the ``out`` object:
 

test/xchar-test.cc

@@ -587,7 +587,7 @@ template <class charT> struct formatter<std::complex<double>, charT> {
                             fmt::runtime("{:" + specs + "}"), c.imag());
     auto fill_align_width = std::string();
     if (specs_.width > 0) fill_align_width = fmt::format(">{}", specs_.width);
-    return format_to(ctx.out(), runtime("{:" + fill_align_width + "}"),
+    return fmt::format_to(ctx.out(), runtime("{:" + fill_align_width + "}"),
                           c.real() != 0 ? fmt::format("({}+{}i)", real, imag)
                                         : fmt::format("{}i", imag));
   }