Fix: Email highlighting for unclosed parenthesis in Subject header
Summary:
Unfortunately, the "Subject:" header needs to be treated independently
of the other headers, since it may contain arbitrary text such as paranthesis
that is not a comment or similar. The fix is to add another context without
the comment highlighting.
BUG: 398717
Test Plan: make test
Reviewers: vkrause
Reviewed By: vkrause
Subscribers: kwrite-devel, kde-frameworks-devel
Tags: Kate, Frameworks
Differential Revision: https://phabricator.kde.org/D15556