Fix and improve description of the `lgtunit` predicates used for setting text and binary input
Fix and improve description of the `lgtunit` predicates used for setting text and binary input

LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3