* lisp/tla+-mode.el (tla+-java-path): (tla+-dot-binary): remove some default paths that may be not useful or helpful for other users. (tla+-run-sany): (tla+-run-model): (tla+-run-pluscal): (tla+-run-tlatex): (tla+-run-model): add an error check (if the tla+-tlatools-path is not set, print an error message) (tla+-run-dot): run dot only when the binary to dot is given.