Sync SDL2 wiki -> header

include/SDL_touch.h

@@ -85,7 +85,7 @@ extern DECLSPEC int SDLCALL SDL_GetNumTouchDevices(void);
 /**
  * Get the touch ID with the given index.
  *
- * \param index the touch device index
+ * \param index the touch device index.
  * \returns the touch ID with the given index on success or 0 if the index is
  *          invalid; call SDL_GetError() for more information.
  *
@@ -113,7 +113,7 @@ extern DECLSPEC SDL_TouchDeviceType SDLCALL SDL_GetTouchDeviceType(SDL_TouchID t
 /**
  * Get the number of active fingers for a given touch device.
  *
- * \param touchID the ID of a touch device
+ * \param touchID the ID of a touch device.
  * \returns the number of active fingers for a given touch device on success
  *          or 0 on failure; call SDL_GetError() for more information.
  *
@@ -128,8 +128,8 @@ extern DECLSPEC int SDLCALL SDL_GetNumTouchFingers(SDL_TouchID touchID);
  *
  * The returned resource is owned by SDL and should not be deallocated.
  *
- * \param touchID the ID of the requested touch device
- * \param index the index of the requested finger
+ * \param touchID the ID of the requested touch device.
+ * \param index the index of the requested finger.
  * \returns a pointer to the SDL_Finger object or NULL if no object at the
  *          given ID and index could be found.
  *