formatting: add additional space to avoid bad syntax highlights

src/MISC/fix_orient_bcc.cpp

@@ -488,7 +488,7 @@ double FixOrientBCC::compute_scalar()
 /* ---------------------------------------------------------------------- */
 
 int FixOrientBCC::pack_forward_comm(int n, int *list, double *buf,
-                                    int /*pbc_flag*/, int */*pbc*/)
+                                    int /*pbc_flag*/, int * /*pbc*/)
 {
   int i,j,k,num;
   tagint id;