SWDEV-448163 - Fix Doxygen warnings

Change-Id: If72e312461a72920b6a482009c9aef4cf92f2e1b


[ROCm/hip-tests commit: 6c23e25c86]

projects/hip-tests/catch/unit/math/casting_float_funcs.cc

@@ -438,3 +438,8 @@ TEST_CASE("Unit_Device___float_as_uint_Positive") {
  *    - HIP_VERSION >= 5.2
  */
 TEST_CASE("Unit_Device___float_as_uint_Negative_RTC") { NegativeTestRTCWrapper<3>(kFloatAsUint); }
+
+/**
+* End doxygen group MathTest.
+* @}
+*/