test, add regression case for tk's unescaped double quotes
fix, catch run-away (unescaped) newlines
chore, actually print errors if warn macro isn't defined
test, adapt regression glep.29.tst to actual behaviour
Merge branch 'bug/glep-segfault'

* bug/glep-segfault:
  test, adapt regression glep.29.tst to actual behaviour
  chore, actually print errors if warn macro isn't defined
  fix, catch run-away (unescaped) newlines
  test, add regression case for tk's unescaped double quotes