UIA: degenerate text ranges not degenerate after move #7342
Description
Environment
Windows build number: [run `[Environment]::OSVersion` for powershell, or `ver` for cmd] Latest master of OpenConsole
Windows Terminal version (if applicable):
Any other software? NVDA
Steps to reproduce
>>> # In the NVDA Python console (NVDA+control+z)
>>> # In a Microsoft Word document (using UIA for access, enable in advanced settings), caret positioned on the first "C" in "Cactus".
>>> start = nav.makeTextInfo("caret")
>>> end = start.copy()
>>> end.move("character", 2) # move to the second "c".
2
>>> marker=start.copy()
>>> marker.setEndPoint(start, "startToStart") # Calls MoveEndpointByRange for UIA controls.
>>> marker.setEndPoint(end, "endToEnd")
>>> marker.text
'Ca' # GOOD
>>> # Now, in conhost with UIA enabled
>>> start = nav.makeTextInfo("caret")
>>> end = start.copy()
>>> end.move("character", 2)
2
>>> marker=start.copy()
>>> marker.setEndPoint(start, "startToStart")
>>> marker.setEndPoint(end, "endToEnd")
>>> marker.text
'Cac' # BADExpected behaviour
Conhost matches Microsoft Word when calling MoveEndpointByRange.
Actual behaviour
See above.