x/net/webdav: Fatalf call with %q on wrong type

[gopherbot]

#!watchflakes
default <- pkg == "golang.org/x/net/webdav" && test == "" && `Errorf format %q has arg propstats of wrong type`

Issue created automatically to collect these failures.

Example (log):

FAIL	golang.org/x/net/webdav [build failed]
# golang.org/x/net/webdav
# [golang.org/x/net/webdav]
webdav/prop_test.go:559:34: (*testing.common).Errorf format %q has arg propstats of wrong type []golang.org/x/net/webdav.Propstat

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/net/webdav" && test == ""

2025-11-22 00:46 x_net-gotip-linux-amd64-tiplang net@346cc615 go@58a48a3e x/net/webdav (log)

FAIL	golang.org/x/net/webdav [build failed]
# golang.org/x/net/webdav
# [golang.org/x/net/webdav]
webdav/prop_test.go:559:34: (*testing.common).Errorf format %q has arg propstats of wrong type []golang.org/x/net/webdav.Propstat

— watchflakes

[gopherbot]

Change https://go.dev/cl/725220 mentions this issue: http2, webdav, websocket: fix %q verb uses with wrong type

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "golang.org/x/net/webdav" && test == "" && `Errorf format %q has arg propstats of wrong type`

2025-11-24 22:33 x_net-gotip-linux-amd64-tiplang net@88a64217 go@7fbd141d x/net/webdav (log)

FAIL	golang.org/x/net/webdav [build failed]
# golang.org/x/net/webdav
# [golang.org/x/net/webdav]
webdav/prop_test.go:559:34: (*testing.common).Errorf format %q has arg propstats of wrong type []golang.org/x/net/webdav.Propstat

2025-11-24 22:35 x_net-gotip-linux-amd64-tiplang net@bff14c52 go@c6f882f6 x/net/webdav (log)

FAIL	golang.org/x/net/webdav [build failed]
# golang.org/x/net/webdav
# [golang.org/x/net/webdav]
webdav/prop_test.go:559:34: (*testing.common).Errorf format %q has arg propstats of wrong type []golang.org/x/net/webdav.Propstat

2025-11-25 01:04 x_net-gotip-linux-amd64-tiplang net@ec11eccf go@de456450 x/net/webdav (log)

FAIL	golang.org/x/net/webdav [build failed]
# golang.org/x/net/webdav
# [golang.org/x/net/webdav]
webdav/prop_test.go:559:34: (*testing.common).Errorf format %q has arg propstats of wrong type []golang.org/x/net/webdav.Propstat

— watchflakes