time: second precision timezone format not documented

[alicebob]

go doc time says:

    Numeric time zone offsets format as follows:

        "-0700"  ±hhmm
        "-07:00" ±hh:mm
        "-07"    ±hh

However, timezones with second precision ("-07:00:00" and "-070000") are also supported: https://github.com/golang/go/blob/master/src/time/format.go#L151

Could these be added to the documentation? Took me a while to figure out why my pre-1900 date with LMT timezone parsed correctly.

[ianlancetaylor]

Thanks for the report. Want to send a patch?

[gopherbot]

Change https://go.dev/cl/402058 mentions this issue: time: typo more time zone offsets format