Improve support for C++98 compilers that require a copy ctor when binding a reference to a temporary.

README.rst

@@ -98,7 +98,8 @@ with an arbitrary action performed when formatting is complete:
 
     // Formats an error message and prints it to std::cerr.
     fmt::Formatter<PrintError> ReportError(const char *format) {
-      return Move(fmt::Formatter<PrintError>(format));
+      fmt::Formatter<PrintError> f(format);
+      return f;
     }
 
     ReportError("File not found: {}") << path;