I struggled with this question for some time and was able to find the solution. The idea is that my script automatically generates a data, puts it into table and there are some columns that should preserve their width (should not be less then something). But jira markup sets table column width dynamically basing on screen resolution and data that is preserved in all the table columns. And noformat for data cells did not help me because there was some symbols in those columns that required jira markup. I am not jira admin so using advanced plugins and jira scripts is not an option.