path errors

gitstats

         outputpath = os.path.abspath(args[-1])
 
         # execute git2json for top files
-        os.system("git2json > ~"+os.path.abspath(args[-1])+"/top_committed_files.json")
+        os.system("git2json > '"+os.path.abspath(args[-1])+"/top_committed_files.json'")
 
         rundir = os.getcwd()