pretty printing for lp

Author: NikolajBjorner

src/math/lp/column_namer.h

@@ -53,7 +53,7 @@ class column_namer {
             if (val == -numeric_traits<T>::one())
                 out << " - ";
             else if (val != numeric_traits<T>::one())
-                out << val;
+                out << val << "*";
 
             out << get_variable_name(it.second);
         }

src/math/lp/lp_utils.h

@@ -118,7 +118,7 @@ std::ostream& print_linear_combination_customized(const vector<std::pair<T, unsi
             }
         }
         if (val != 1) {
-            out << T_to_string(val);
+            out << T_to_string(val) << "*";
         }
         out << var_str(it.second);
     }