Fix rendering.

README.rst

@@ -107,7 +107,7 @@ which take arbitrary arguments:
 
     ReportError("File not found: {}", path);
 
-Note that you only need to define one function that takes `const fmt::ArgList &`
+Note that you only need to define one function that takes ``const fmt::ArgList &``
 argument and `FMT_VARIADIC` automatically defines necessary wrappers that
 accept variable number of arguments. These wrappers are simple inline functions
 that are very fast and don't result in code bloat.