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: Too many #ifdefs. Solution: Graduate FEAT_MBYTE, the final chapter.
Problem: Test files have inconsistant modelines. Solution: Don't set 'tabstop' to 2, use 'sts' and 'sw'.
Problem: No test for what 7.4.1948 fixes. Solution: Add a test. (Hirohito Higashi, closes #880)
