TO paraphrase a modem slogan, in local government law "little goes right if the contract's too tight." For the layman who bargains in good faith with a municipality or county, the introduction to this principle can be a jolt. To be told that his contract was not a contract, because it would have unduly bound the local government, must prompt serious doubts in his mind about the law commanding this re- sult. To be told that he is legally presumed to know this must confirm his suspicions. The loca