Command prompt tab completion

[dan1982code]

In a command prompt, Create a directory with two subdirectories called w14 and w15. Keep pressing tab; the command prompt tab-completes between the two subdirectories (w14 and w15) but NVDA does not read these changes except for the first. If the tab-completed names are very different, then NVDA does read them.

[Adriani90]

@dan1982code are you still having this issue with last NVDA Alpha?

[dan1982code]

Yes. It's as if when only the final character changes, NVDA misses it and speaks nothing. Thanks!

[Adriani90]

cc: @LeonarddeR, @derekriemer

[Adriani90]

cc: @codeofdusk is this maybe also fixed in UIA environment?

[codeofdusk]

cc: @codeofdusk is this maybe also fixed in UIA environment?

No, since we use the same diffing algorithm (in fact, nothing is announced in UIA since we clear the words buffer for tab, which is dropping some things). I may revert that to improve consistency with other consoles (i.e. NVDA's python console).

[codeofdusk]

This is caused by the same underlying problem as #3200.