Tablesorter bug when headers on 2 rows and {sorter: 'text'} clause

[beaud76]

Hi,

I am a great fan of tablesorter. It's a fantastic tool. Many Thanks for that.

I have found an issue with tables having column headers on 2 rows when a {sorter: 'text'} clause is configured for one or several columns. On the upper header row, some columns may have sorting capability (arrows on their right) while they have the "sorter-false" class.

Attached is a test case (1 html file and 2 png files for the result) that shows 4 tables, 3 of them showing the issue. I have tested with JQuery 3.7.1 and the latest tablesorter 2.32.0 version.

table_sorter_issue.zip