Fix for issue 7902.
Use utils.RFC3339NanoFixed ("2006-01-02T15:04:05.000000000Z07:00")
instead of time.RFC3339Nano to format our log timestamps - this way
things are aligned, in particular the nano seconds are padded with zeros
@@ -760,8 +760,9 @@ Passing a negative number or a non-integer to `--tail` is invalid and the
value is set to `all` in that case. This behavior may change in the future.
The `docker logs --timestamp` commands will add an RFC3339Nano
-timestamp, for example `2014-05-10T17:42:14.999999999Z07:00`, to each
-log entry.
+timestamp, for example `2014-09-16T06:17:46.000000000Z`, to each
+log entry. To ensure that the timestamps for are aligned the
+nano-second part of the timestamp will be padded with zero when necessary.
## port
