2.0.x: Discard ANSI escape sequence from elog_add
Backport of !6039 (merged) into 2.0.x.
This PR make sure the ANSI sequence was dropped from the elog_add content.
An extra test was added for prdef, cause it's a kind of special.
Backport of !6039 (merged) into 2.0.x.
This PR make sure the ANSI sequence was dropped from the elog_add content.
An extra test was added for prdef, cause it's a kind of special.