Based on the information from bunch of the latest supported distros:
Debian Jessie: 1.55
Debian Stretch: 1.62
Ubuntu 16.04: 1.58
Ubuntu 18.04: 1.65
Fedora 31 and 32: 1.69
Redhat Enterprise Linux 8: 1.66 (1.53 for EL-7, though)
openSuse Leap 15.1: 1.66
Several typos and uniformity fixes.
Note:
*SCL/SimpleDataTypes.py is a upstream stepcode file whose fiz has been submitted upstream and accepted.
*the header of Tools/generateBase/generateMetaModel_Module.xsd had redundant data. It has been removed. Please double check it.
+ some are doxy others are just comment code.
+ some minor whitespace and grammatical tweaks.
+ app/SCL/* typos have also been submitted upstream (https://github.com/stepcode/stepcode/pull/366). So it's ok to merge them in to master.