The New Hampshire attorney general will appeal a Strafford County Superior Court ruling Monday that put on hold a new voter registration law that opponents claimed would disenfranchise nonresident college students. Secretary of State Bill Gardner, who supported the law that the Republican-dominated Legislature passed over Gov. John Lynch’s veto earlier this year, said he was told by the attorney general’s office that it would challenge Judge John Lewis’ decision. The ruling was issued after the state and the plaintiffs failed to come up with an agreement to remedy the dispute last week. In an eight-page decision, Lewis said the law did not pass “constitutional muster” and ordered the state to issue new voter registration forms without the language that required newly registered voters to acknowledge they are subject to all residency laws, including driver’s license and auto registration laws.