There should be no functional changes for the typical usecase,
but it allows to have more tricky setups like pointing to a
BAT script to override some configuration.
The issue is that BAT scripts do not support new lines in the
command line arguments. That's where single-line python expression
helps.
For example, it is possible to point benchmark script to a blender.bat
which contains
blender.exe --python-expr "import bpy; bpy.context.preferences.addons['cycles'].preferences.use_oneapirt = False" %*
to have side-by-side numbers of oneAPI with and without HW RT.
Without this change the %* is which did not work: the BAT
script did not "see" part of the command line past the new line.
Pull Request: https://projects.blender.org/blender/blender/pulls/109006
2d3c9bcee8