test: don't use wiki urls for documentation comments

Also make consistent use of \ as documentation escape character.

test/testhaptic.c

@@ -11,14 +11,11 @@ Redistribution and use in source and binary forms, with or without modification,
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
-/*
- * includes
- */
-#include <stdlib.h>
-
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_main.h>
 
+#include <stdlib.h>
+
 static SDL_Haptic *haptic;
 
 /*
@@ -28,9 +25,9 @@ static void abort_execution(void);
 static void HapticPrintSupported(SDL_Haptic *);
 
 /**
- * @brief The entry point of this force feedback demo.
- * @param[in] argc Number of arguments.
- * @param[in] argv Array of argc arguments.
+ * \brief The entry point of this force feedback demo.
+ * \param[in] argc Number of arguments.
+ * \param[in] argv Array of argc arguments.
  */
 int main(int argc, char **argv)
 {
@@ -288,7 +285,7 @@ int main(int argc, char **argv)
     return 0;
 }
 
-/*
+/**
  * Cleans up a bit.
  */
 static void
@@ -302,7 +299,7 @@ abort_execution(void)
     exit(1);
 }
 
-/*
+/**
  * Displays information about the haptic device.
  */
 static void