quoted-printable encoded entities are not correctly converted

[j-ed]

The vCard 2.1 format allows to use quoted-printable encoded entities, which aren't allowed to be used in vCard 3.0/4.0 anymore.

If the library is used to convert a contact record from the vCard2.1 to the vCard 3.0 format the quoted-printable entities are currently kept and not decoded/converted correctly. This causes problems when international characters are used in, e.g. names, and usually prevents an app from importing data correctly. CC: @AndyScherzinger @tobiasKaminsky

The problem has been reported and described here:

nextcloud/contacts#584 (comment)
nextcloud/server#10653

[mangstadt]

Thanks for the report. Fixed in fa82fc8.

Fix will be included in the next release.

See unit test: https://github.com/mangstadt/ez-vcard/blob/master/src/test/java/ezvcard/issue/Issue112.java