Merge pull request #810 in CASA/casa from feature/CAS-12036 to master
* commit '81410945d61b71fd90be66d693dd734d048741b1':
Adjusting whitespace in FringeJones.cc to match master
Fixing a bug with single-polarisation fringe fitting
Added a new convergence criterion to fringefit, modeled on the one used in AIPS FRING task