Document to_wstring

doc/api.rst

@@ -153,6 +153,8 @@ Utilities
 
 .. doxygenfunction:: fmt::to_string(const T&)
 
+.. doxygenfunction:: fmt::to_wstring(const T&)
+
 .. doxygenclass:: fmt::basic_memory_buffer
    :protected-members:
    :members:

include/fmt/format.h

@@ -3390,6 +3390,11 @@ std::string to_string(const T &value) {
   return str;
 }
 
+/**
+  \rst
+  Converts *value* to ``std::wstring`` using the default format for type *T*.
+  \endrst
+ */
 template <typename T>
 std::wstring to_wstring(const T &value) {
   std::wstring str;