Use of expand-child class to define subordinate/child table row breaks table sorting function. Example at https://en.wikipedia.org/wiki/2014_term_United_States_Supreme_Court_opinions_of_Ruth_Bader_Ginsburg. Loss of function occurred relatively recently, could be caused by change to colspan--see comment at https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_%28technical%29&diff=684281564&oldid=684271506 .
|mediawiki/core : master||jquery.tablesorter: use of expand-child class|
In the past cssChildRows are read for auto detection of parser only for the first row. Now cssChildRows are scipped for auto detection and sorting.
After change I5180296 i have tested the example in https://en.wikipedia.org/wiki/Help:Sorting#Keeping some rows together. But this example have only text in the first row and in this case the second row was not read.