whitespace fixes

src/utils.cpp

@@ -633,15 +633,15 @@ int utils::expand_args(const char *file, int line, int narg, char **arg, int mod
 		  expandflag = 1;
 		}
 	      }
-	    
+
 	    } else if (arg[iarg][0] == 'd') {
 	      *ptr1 = '\0';
 	      int flag,cols;
 	      int icustom = lmp->atom->find_custom(&arg[iarg][3],flag,cols);
 	      *ptr1 = '[';
-	      
+
 	      // check for custom per-atom floating point array
-	      
+
 	      if (icustom >= 0) {
 		if (mode == 1 && flag && cols) {
 		  nmax = cols;