Merge pull request #7112 from rfuentess/doxygen_fixes

Doxygen:  Minor series of fixes for the documentation

core/include/thread.h

@@ -63,10 +63,13 @@
  * Usage
  * -----
  * ~~~~~~~~~~~~~~~~~~~~~~~~ {.c}
+ * #include "thread.h"
+ *
  * char rcv_thread_stack[THREAD_STACKSIZE_MAIN];
  *
  * void *rcv_thread(void *arg)
  * {
+ *     (void) arg;
  *     msg_t m;
  *
  *     while (1) {

doc/doxygen/src/creating-modules.md

@@ -21,7 +21,7 @@ A module's Makefile just needs to include `Makefile.base` in the RIOT
 repository:
 
 ~~~~~~~~~~~~~~~~~~~ {.mk}
-include $(RIOTBASE)/Makefile
+include $(RIOTBASE)/Makefile.base
 ~~~~~~~~~~~~~~~~~~~
 
 If your module's name differs from the name of the directory it resides in you

sys/include/net/sock/udp.h

@@ -63,7 +63,7 @@
  * implementation (e.g. `gnrc_ipv6_default` for @ref net_gnrc GNRC) and at least
  * one network device.
  *
- * After including the header file for @ref net_sock_udp "UDP sock", we create some 
+ * After including the header file for @ref net_sock_udp "UDP sock", we create some
  * buffer space `buf` to store the data received by the server:
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.c}
@@ -313,7 +313,7 @@ typedef struct sock_udp sock_udp_t;
  *                      @ref SOCK_ADDR_ANY_NETIF or equal to sock_udp_ep_t::netif
  *                      of @p local if `local != NULL`.
  * @param[in] flags     Flags for the sock object. See also
- *                      [sock flags](net_sock_flags).
+ *                      [sock flags](@ref net_sock_flags).
  *                      May be 0.
  *
  * @return  0 on success.