No improvement assessment shall be rendered invalid by reason of a failure of the city engineer’s report to contain all of the information required by Section 3.12.030, or by reason of a failure to have all of the information required to be in the improvement resolution, the assessment ordinance, the lien docket, or notices required to be published and mailed, nor by the failure to list the name of, or mail notice to, the owner of any property as required by Section 3.12.050, or by reason of any other error, mistake, delay, omission, irregularity, or other act, jurisdictional or otherwise, in any of the proceedings or steps specified, unless it appears that the assessment is unfair or unjust in its effect upon the person complaining; and the council shall have the power and authority to remedy and correct all such matters by suitable action proceedings. (Prior code 2.032)