fix broken launch services database search under Catalina

Author: sakra

CMake/Mathematica/FindMathematica.cmake

@@ -367,7 +367,7 @@ function (_add_launch_services_search_paths _outSearchPaths)
 		foreach (_bundleID IN ITEMS ${ARGN})
 			execute_process(
 				COMMAND "${Mathematica_LSRegister_EXECUTABLE}" "-dump"
-				COMMAND "grep" "--before-context=20" "--after-context=20" " ${_bundleID} "
+				COMMAND "grep" "--before-context=20" "--after-context=20" "${_bundleID}"
 				COMMAND "grep" "--only-matching" "/.*\\.app"
 				TIMEOUT 10 OUTPUT_VARIABLE _queryResult ERROR_QUIET)
 			string (REPLACE ";" "\\;" _queryResult "${_queryResult}")