* LaTeX fix for the curvefit chapter of the user manual.
* The isInf() and isNan() functions of lib.float can now handle values of None. If None is encountered, the functions simply return False.
* The model-free optimisation code now handles minfx returning nothing. This is due to the fix of [https://gna.org/bugs/?21001 bug #21001] in relax, which is really a fix for an upstream [https://gna.org/projects/{{minfx/ homepage}} minfx] [https://gna.org/bugs/?21090 bug #21090].
* Created the Mf.test_bug_21079_local_tm_global_selection system test. This is to catch [https://gna.org/bugs/?21079 bug #21079].
* Extended the Mf.bug_21079_local_tm_global_selection system test for all Monte Carlo simulation steps.