R v4.3 as.character w/ POSIXct

[sashahafner]

Copied from jumbled repo.

"as.character() now behaves more in line with the methods for atomic vectors such as numbers, and is no longer influenced by options(). Ditto for as.character(). The as.character() method gets arguments digits and OutDec with defaults not depending on options(). Use of as.character(*, format = .) now warns."

That's from https://cran.r-project.org/bin/windows/base/NEWS.R-4.3.3.html

"now warns" is misleading, because it doesn't work anymore.
Simple, maybe complete solution is to replace as.character() with `format()'.

[sashahafner]

Should be addressed now with v2.45 40728d7