Added GCOVR_EXCLUDE variable for clarity

CMakeLists.txt

@@ -160,7 +160,14 @@ if("${CMAKE_BUILD_TYPE}" STREQUAL "Coverage")
     set(GCOVR_EXTRA "--gcov-executable=${LLVM_COV} gcov")
   endif()
 
-  set(GCOVR_OPTIONS --object-directory="${PASTIS_BINARY_DIR}" -r "${PASTIS_SOURCE_DIR}/src"  -e "${PASTIS_SOURCE_DIR}/src/experimental" -e "${PASTIS_SOURCE_DIR}/src/main.cpp" -e "${PASTIS_SOURCE_DIR}/src/utils/BacktraceManager.cpp" -e "${PASTIS_SOURCE_DIR}/src/utils/BacktraceManager.hpp" ${GCOVR_EXTRA})
+  set (GCOVR_EXCLUDE
+    -e "${PASTIS_SOURCE_DIR}/src/experimental"
+    -e "${PASTIS_SOURCE_DIR}/src/main.cpp"
+    -e "${PASTIS_SOURCE_DIR}/src/utils/BacktraceManager.cpp"
+    -e "${PASTIS_SOURCE_DIR}/src/utils/BacktraceManager.hpp"
+    )
+
+  set(GCOVR_OPTIONS --object-directory="${PASTIS_BINARY_DIR}" -r "${PASTIS_SOURCE_DIR}/src" ${GCOVR_EXCLUDE} ${GCOVR_EXTRA})
 
   add_custom_target(run_unit_tests
     ALL