Fix header names in documentation.

include/helpers.hpp

@@ -20,6 +20,8 @@
 #include <string>
 #include <string_view>
 
+//! @headerfile helpers.hpp mastodonpp/helpers.hpp
+
 namespace mastodonpp
 {
 

include/mastodonpp.hpp

@@ -25,8 +25,6 @@
 #include "types.hpp"
 
 /*!
- *  @headerfile mastodonpp.hpp mastodonpp/mastodonpp.hpp
- *
  *  @mainpage mastodonpp Reference
  *
  *  @section using Using the library
@@ -114,6 +112,8 @@
  *  @brief  C++ wrapper for the Mastodon %API.
  *
  *  @since  0.1.0
+ *
+ *  @headerfile mastodonpp.hpp mastodonpp/mastodonpp.hpp
  */
 namespace mastodonpp
 {} // namespace mastodonpp

include/types.hpp

@@ -75,9 +75,6 @@ using parameterpair =
  *  @brief  Return type for Request%s.
  *
  *  @since  0.1.0
- *
- *  @headerfile answer.hpp mastodonpp/answer.hpp
- *
  */
 struct answer_type
 {
@@ -88,6 +85,8 @@ struct answer_type
      *  [libcurl-errors(3)](https://curl.haxx.se/libcurl/c/libcurl-errors.html).
      *
      *  @since  0.1.0
+     *
+     *  @headerfile types.hpp mastodonpp/types.hpp
      */
     uint8_t curl_error_code{0};