[help] long timestamp formatting is incorrect

[brendanf]

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Description

The long format timestamps used in the timestamp reporter have incorrect fractional seconds since 6177844. I noticed this in my pipeline, where the fractional seconds were always exactly the same as the integer seconds, but it's easy to reproduce it without actually running a pipeline.

library(targets)
time <- as.POSIXct("2024-02-20 17:57:13.78")
targets:::time_stamp(time)
#[1] "2024-02-20 15:57:13.13"
targets:::time_stamp_format
#[1] "%Y-%m-%d %H:%M:%S.%OS"

The repetition comes because %OS includes the seconds as well as the fractional seconds rounded to a certain number of digits past the decimal, by default 0. I think the format you want is something like "%Y-%m-%d %H:%M:%OS2".

[wlandau]

Fixed as of 13f74aa