test-split: stabilize for Windows - $PYTHON needs to be quoted when used as an executable in $HGEDITOR. This avoids the error "'c' is not recognized as an internal or external command". - seq.py is printing out CRLF, and then the subsequent `sed` script seems to convert to LF on MSYS. IDK if python print statements can be made to print LF on Windows, and I'm pretty sure CRLF is baked into some other tests. - A stray glob was causing the 'obsstore-off' case to report 'no result code from test'. - When I ran with --debug, the `hg diff` commands in the test both printed color sequences, and paused the output as it was run through the pager.

lfs: use ui.note() and ui.debug() instead of ui.write() and their flags Even though the upload/download message is still in a ui.verbose check, I switched that to ui.note() too so that the 'ui.note' label is applied. The debug message is no longer marked for translation because check-code complained.

lfs: only hardlink between the usercache and local store if the blob verifies This fixes the issue where verify (and other read commands) would propagate corrupt blobs. I originalled coded this to only hardlink if 'verify=True' for store.read(), but then good blobs weren't being linked, and this broke a bunch of tests. (The blob in repo5 that is being corrupted seems to be linked into repo5 in the loop running dumpflog.py prior to it being corrupted, but only if verify=False is handled too.) It's probably better to do a one time extra verification in order to create these files, so that the repo can be copied to a removable drive. Adding the same check to store.write() was only for completeness, but also needs to do a one time extra verification to avoid breaking tests.