fix commandLine for partition with weights\ntri in the documentation, triangle...

fix commandLine for partition with weights\ntri in the documentation, triangle in the code\nnow, both are allowed (only one should be allowed?)

Common/CommandLine.cpp

@@ -369,7 +369,7 @@ void GetOptions(int argc, char *argv[])
         opt_mesh_partition_metis_algorithm(0, GMSH_SET, 3); // partGraphKWay w/ weights
         while (check) {
           if (argv[i]) {
-            if (!strcmp(argv[i],"triangle")) {
+            if (!strcmp(argv[i],"tri") || !strcmp(argv[i],"triangle")) {
               i++;
               opt_mesh_partition_tri_weight(0,GMSH_SET,atoi(argv[i]));
             }
@@ -393,7 +393,10 @@ void GetOptions(int argc, char *argv[])
               i++;
               opt_mesh_partition_hex_weight(0,GMSH_SET,atoi(argv[i]));
             }
-            else check = false;
+            else {
+              Msg::Error("Bad argument for 'partWeight' (%s)", argv[i]);
+              check = false;
+            }
             i++;
           }
           else check = false;