Quote strings with leading/trailing spaces in csv (`CsvWriteFeature.QUOTE_STRINGS_WITH_LEADING_TRAILING_WHITESPACE`)

[sfzhi]

I would like to suggest to add a feature flag to CsvGenerator, which, if enabled, would cause any string values that contain leading or trailing white space to always be quoted.
Some CSV parsers out there do not handle leading/trailing spaces very well, if unquoted. If Jackson needs to produce CSV for consumption by one of those parsers, currently it would have to resort to force quoting of all strings, which may be undesirable for a number of reasons.

[cowtowncoder]

Does CsvGenerator.Feature.STRICT_CHECK_FOR_QUOTING not do that already?

[sfzhi]

As far as I have observed, it doesn't. I am guessing that's because quotes in this particular case are not strictly required.

[cowtowncoder]

@sfzhi Thank you -- it does sound like there should be a way to force quoting, then; and if not done by default at this point, probably needs to be a new feature (if so, needs to go in 2.12.0).