Problem: output of ":scriptnames" goes into the message history, while this
des not happen for other commands, such as ":ls".
Solution: Use msg_outtrans() instead of smsg(). (closes#9551)
Problem: Various inconsistencies in test files.
Solution: Add modelines where they were missing. Use Check commands instead
of silently skipping over tests. Adjust indents and comments.
(Ken Takata, closes#6695)
Problem: It is not easy to edit a script that was sourced.
Solution: Add a count to ":scriptnames", so that ":script 40" edits the
script with script ID 40.
